[10][11] Timocharis, Aristarchus, Aristillus, Archimedes, and Hipparchus were the first Greeks known to divide the circle in 360 degrees of 60 arc minutes. Angle Degrees 12. Angle Degrees 10. Revolution One turn is equal to 360°. Definition: A degree (symbol: °) is a unit of angular measurement defined by a full rotation of 360 degrees. When this is not the case, as in astronomy or for geographic coordinates (latitude and longitude), degree measurements may be written using decimal degrees, with the degree symbol behind the decimals; for example, 40.1875°. Note that angle 1 and angle 2 do not have to be adjacent to be complementary as long as they add up to 90 degrees. Cycle Hour angle Mil (NATO) The divisors of 360 are 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, and 360. It is approximately equal to one milliradian (c. ​1⁄6,283). Turn Grad With the invention of the metric system, based on powers of ten, there was an attempt to replace degrees by decimal "degrees"[note 3] called grad or gon, where the number in a right angle is equal to 100 gon with 400 gon in a full circle (1° = ​10⁄9 gon). One theory states that it is related to the fact that 360 is approximately the number of days in a year. The value will be converted to all other units of the actual measure. To convert between 1/8 Circle and Degree you have to do the following: First divide (Math.PI/4) / (Math.PI/180) = 45.. Then multiply the amount of 1/8 Circle you want to convert to Degree, use the chart below to guide you. Mil (Soviet Union) The degree and its subdivisions are the only units in use which are written without a separating space between the number and unit symbol (e.g. A reference angle is the acute version of any angle determined by repeatedly subtracting or adding straight angle (1 / 2 turn, 180°, or π radians), to the results as necessary, until the magnitude of the result is an acute angle, a value between 0 and 1 / 4 turn, 90°, or π / 2 radians. Arrow connected with the vial will indicate the measured angle. History/origin: The origin of the degree as a unit of rotation and angles is not clear. Angles are used in geometry, trigonometry, geography and astronomy. 3. The turn (or revolution, full circle, full rotation, cycle) is used in technology and science. It is easy to use with accuracy to within plus or minus 1 degree. In mathematics, a degree is a common way to measure plane angle.It is written with the symbol ∘, where ∘ corresponds to the entire circle.. Maritime charts are marked in degrees and decimal minutes to facilitate measurement; 1 minute of latitude is 1 nautical mile. The answers are 1 in 40 ratio and 1.4321 degrees. Mil (Sweden) One of the theories suggests that 360 is readily divisible, has 24 divisors, and is divisible by every number from one to ten, except for seven, making the number 360 a versatile option for use as an angle measure. Radians Preferred by Mathematicians. 3. degree ° radian . Note that there are rounding errors in these values. An angular mil, which is most used in military applications, has at least three specific variants, ranging from ​1⁄6,400 to ​1⁄6,000. The answer is: 1 1/8 rev equals 45.00 ° Enter 2.44992 and reading the second output line we see this yields a 1 in 40 ratio and a 1.4321 degree angle. These subdivisions were denoted by writing the Roman numeral for the number of sixtieths in superscript: 1I for a "prime" (minute of arc), 1II for a second, 1III for a third, 1IV for a fourth, etc. Angle of degree 1. Another way to calculate the exterior angle of a triangle is to subtract the angle of the vertex of interest from 180°. Another motivation for choosing the number 360 may have been that it is readily divisible: 360 has 24 divisors,[note 1] making it one of only 7 numbers such that no number less than twice as much has more divisors (sequence A072938 in the OEIS). A mil measuring ​1⁄6,000 of a revolution originated in the imperial Russian army, where an equilateral chord was divided into tenths to give a circle of 600 units. For the complementary angle, reverse the rise and run. 1) Degree. 1/400 of a circle is defined as 1 grad. Work that out and you will get a decimal number of degrees. 1: degree = 1 : degree: 1 = 0.017453292519943 : radian: 1 = 1.1111111111111 : grad: 1 = 60 : minute: 1 = 3600 : second: 1 = 0.033333333333333 : sign: 1 = 17.777777777778 : mil: 1 = 0.0027777777777778 : revolution: 1 = 0.0027777777777778 : circle: 1 = 0.0027777777777778 : turn: 1 = 0.011111111111111 : quadrant: 1 = 0.011111111111111 : right angle: 1 = 0.016666666666667 : sextant: 1 = … Angle 1 and angle 2 are complementary angles because together they form a right angle. The answer is: 1 1/4 rev equals 90.00 ° 1/360 of a circle is defined as 1° called "one degree." Radians 8 decimals This form is used in astronomy and defining latitude and longitude. Angle of degree 10. This is how large 1 Degree is . [citation needed], The division of the circle into 360 parts also occurred in ancient India, as evidenced in the Rigveda:[13]. So the above would be pronounced \"forty five point one two degrees\". A radian is a unit of angular measure in the International System of Units (SI). 2 decimals A Full Circle is 360° Half a circle is 180° (called a Straight Angle) Quarter of a circle is 90° Degrees (Note: "Degrees" can also mean Temperature, but here we are talking about Angles) The Degree Symbol: ° We use a little circle ° following the number to mean degrees. For example 90° means 90 degrees. 1. This new headset was designed, engineered, and machined in Wolf Tooth’s Minnesota machine … three hundred and sixty like pegs. The original motivation for choosing the degree as a unit of rotations and angles is unknown. For example 45.12°The small circle after the number means \"degrees\". [4] For example, 40.1875° = 40° 11′ 15″, or, using quotation mark characters, 40° 11' 15". To convert between Degree and 1/2 Circle you have to do the following: First divide (Math.PI/180) / (Math.PI) = 0.00555556 . 1% grade = 0.57 degrees = 1 cm per 100 cm = 1 inch per 100 inches = 0.125 inch per foot Vertical Rise, Horizontal Run and Slope Length Horizontal to slope areas - inches/feet Steps of construction Draw a ray OA. The interior angles of a triangle always add up to 180° while the exterior angles of a triangle are equal to the sum of the two interior angles that are not adjacent to it. Rotation It is not possible for a triangle to have more than one vertex with internal angle greater than or equal to 90°, or it would no longer be a triangle. One sixtieth of this, using their standard sexagesimal divisions, was a degree. Right angle 0 decimals Alternatively, the traditional sexagesimal unit subdivisions can be used. It is not an SI unit.The SI uses radian to measure plane angle.However, according to the SI brochure, it is an accepted unit by SI. 15° 30', not 15 ° 30 '). Propose an optical polarization component that can be placed before the polarizer such that half of the power passes through the polarizer. On it are placed together [16], The older system of thirds, fourths, etc., which continues the sexagesimal unit subdivision, was used by al-Kashi[citation needed] and other ancient astronomers, but is rarely used today. When that angle is with respect to a reference meridian, it indicates a location along a great circle of a sphere (such as Earth, Mars, or the celestial sphere). Angle of degree … Gon Degrees Some ancient calendars, such as the Persian calendar and the Babylonian calendar, used 360 days for a year. One degree is divided into 60 minutes (of arc), and one minute into 60 seconds (of arc). Point There are 57.2957795130823 degrees in a radian. The New GeoShift Performance Angle Headset from Wolf Tooth allows riders to alter the geometry of their bike by changing the head tube angle by 1-degree.These are sold as upper/lower pairs, with ZS44/EC44, ZS44/EC49, and ZS44/ZS56 pairings and options for 90-115mm or 115-140mm head tubes. 1/4 Stainless Steel 30 Degree Angle Washer-This product is a part of the HAAS Stainless Legacy Cable Rail System. What is a degree (deg or °)? Example 34° 24' 16'' Degree. A +45 degree polarized beam of optical power Pois passing through a polarizer at an angle of 135 degrees. A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol),[4] is a measurement of a plane angle in which one full rotation is 360 degrees.[5]. Finally, it may be the case that more than one of these factors has come into play. The angle value 0.1 deg (degree) in words is "zero point one deg (degree)". 0.017453292519943 rad Conversion base : 1 ° = 0.017453292519943 rad. The actual reason of choosing the degree as a way to measure plane angle is unknown. One Degree. Circle A degree (in full, a degree of arc, arc degree, or arcdegree), usually symbolized °, is a measurement of plane angle, representing 1／360 of a full rotation. Hewlett-Packard Development Company, L.P. Bureau international des poids et mesures, "Teilbarkeit hochzusammengesetzter Zahlen", https://en.wikipedia.org/w/index.php?title=Degree_(angle)&oldid=998955187, Customary units of measurement in the United States, Articles with unsourced statements from January 2021, Articles with unsourced statements from April 2020, Creative Commons Attribution-ShareAlike License, This page was last edited on 7 January 2021, at 20:22. Radian One radian of angle is the central angle in any circle which opposite arc is equal to the radius of that circle. This calculator is used to add and subtract angles in the form Degrees - Minutes - Seconds (DMS). Bubble level angle meter. is measured in degrees, where a full circle is 360 degrees. These considerations outweigh the convenient divisibility of the number 360. According to that theory, the number is approximately 365 because of the apparent movement of the sun against the celestial sphere, and that it was rounded to 360 for some of the mathematical reasons cited above. The symbol for degree is deg or °. The Full Circle. [17] Hence, the modern symbols for the minute and second of arc, and the word "second" also refer to this system.[18]. Thousands of new, high-quality pictures added every day. Mil (NATO) Learn More at mathantics.comVisit http://www.mathantics.com for more Free math videos and additional subscription based content! Gon 1/60 of a degree is 1 minute, and 1/60 of a minute is 1 second of angle. Next, let's look at an example showing the work and calculations that are involved in converting from degrees to radians (deg to rad). Radians This is for a variety of reasons; for example, the trigonometric functions have simpler and more "natural" properties when their arguments are expressed in radians. One complete turn (360°) is equal to 2π radians, so 180° is equal to π radians, or equivalently, the degree is a mathematical constant: 1° = ​ ⁄180. If the lie angles of your clubs are 1 degree greater than the manufacturer’s standard, your clubs are 1 degree flat. Decigrades (​1⁄4,000) were used with French artillery sights in World War I. Right angle Hour angle Now, taking B as center and with the same radius as before, draw an ar 1/4" Stainless Steel 30 Degree Angle Washer, Type 316. A chord of length equal to the radius made a natural base quantity. Although a degree is not an SI (International System of Units) unit, it is an accepted unit within the SI brochure. 1 decimals They shake not in the least. a. Point History. This is simple to use online converter of weights and measures. [8][9] The earliest trigonometry, used by the Babylonian astronomers and their Greek successors, was based on chords of a circle. 4 decimals Angle Degrees 1. A degree is a non-SI unit of angular measure. There are 0.01745 radians in a degree. 2) Grad. 2. Each degree is divided into 60 minutes, and each minute further divided into 60 seconds. [14][15] Furthermore, it is divisible by every number from 1 to 10 except 7. 1 degree = 0.01745329 radians, 1 degree / 0.01745329 radians = 1 We can write the conversion as: 1 radian = 1 radian * (1 degree / 0.01745329 radians) = 57.29578 degrees And we now have our factor for conversion from radians to degrees since 1 * 57.29578 = 57.29578. Rotation The example above would be given as 40° 11.25′ (commonly written as 11′25 or 11′.25). The core of this tool is liquid with a bubble in a glass vial. The symbol for radian is rad. The angle would be this many degrees, (* means times. Revolution Grad (5) b. 6 decimals A degree (in full, a degree of arc, arc degree, or arcdegree), usually symbolized °, is a measurement of plane angle, representing 1／360 of a full rotation. Then multiply the amount of Degree you want to convert to 1/2 Circle, use the chart below to guide you. Who can comprehend this? [12] Eratosthenes used a simpler sexagesimal system dividing a circle into 60 parts. Because a full rotation equals 2π radians, one degree is equivalent to π/180 radians. Find 90 degree angle stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection. In geometry, an angle. Simply select the input unit, enter the value and click "Convert" button. To determine the number of degrees in … One complete turn (360°) is equal to 2π radians, so 180° is equal to π radians, or equivalently, the degree is a mathematical constant: 1° = ​π⁄180. Angle of degree 12. Contrast this with the relatively unwieldy, These new and decimal "degrees" must not be confused with. Angle Degrees 11. Although that idea was abandoned by Napoleon, grades continued to be used in several fields and many scientific calculators support them. Angle Degrees 13. Turn The graph towards the top of the page shows a small range of angles from zero to 20 degrees. ): 40 + (20 * 1/60) + (50 * 1/60 * 1/60) That is, we have 40 full degrees, 20 minutes - each 1/60 of a degree, and 50 seconds - each 1/60 of 1/60 of a degree. Type the number of Degrees you want to convert in the text box, to see the results in the table. Converting quadrant to degrees value in the angle units scale.TOGGLE : from degrees into quadrants in the other way around.CONVERT : between other angle measuring units - complete list.How many degrees are in 1 quadrant? For example, a typical driver has a lie angle of about 55 degrees, while a 9-iron’s lie angle is about 64 degrees -- the more loft a club contains, the greater the lie angle. Because the radian is based on the pure idea of "the radius being laid along the circumference", it often gives simple and natural results when used in mathematics.. For example, look at the sine function for very small values: 7 decimals Cycle The use of a calendar with 360 days may be related to the use of sexagesimal numbers. How much power passes through the polarizer? These considerations outweigh the convenient divisibility of the number 360. Aristarchus of Samos and Hipparchus seem to have been among the first Greek scientists to exploit Babylonian astronomical knowledge and techniques systematically. For many practical purposes, a degree is a small enough angle that whole degrees provide sufficient precision. When that angle is with respect to a reference meridian, it indicates a location along a great circle of a sphere … Acute Draw a vertical line connecting the 2 rays of the angle. Degrees - Minutes - Seconds angle calculator. 9 decimals DEGREE TO 1/2 CIRCLE (° TO per 2 circle) FORMULA . You just need to centre the bubble between the divisions on the vial. 3. Converter You are currently converting angle units from degree to radian 1 ° = 0.017453292519943 rad. 5 decimals [5] Ancient astronomers noticed that the sun, which follows through the ecliptic path over the course of the year, seems to advance in its path by approximately one degree each day. The Acute Angles ClipArt gallery offers 92 illustrations of acute angles, in one degree increments, from 1 degree to 89 degrees. It is not an SI unit—the SI unit of angular measure is the radian—but it is mentioned in the SI brochure as an accepted unit. Let's suppose we are entering a grade that was computed by rise over slope length. Simply line up the common slope with any straight edge and see what degree … Circle Another theory is that the Babylonians subdivided the circle using the angle of an equilateral triangle as the basic unit, and further subdivided the latter into 60 parts following their sexagesimal numeric system. 1. tan (angle) = opposite/adjacent = Line CD/ Line AD = size/distance Since this works for small angles, let us take the tangent of 1 degree which is .017455 which means that when an object's size is .017455 times its distance, it has an angular size of 1 degree. [6] Because a full rotation equals 2π radians, one degree is equivalent to π/180 radians. Ex 11.1, 2 Construct an angle of 45° at the initial point of a given ray and justify the construction . Convert Angle from Degree to Gradient or to different units such as Radian, Degree, Gradient, Minutes, Seconds, Point, Mil, Circle, 1/16 Circle, 1/10 Circle, 1/8 Circle, 1/6 Circle, 1/4 Circle, 1/2 Circle and more units Degree and Gradient are the units to measure Angle, where 1 Degree = 1.1111111 Gradient This may be seen on a lining plane (an early device for aiming indirect fire artillery) dating from about 1900 in the St. Petersburg Museum of Artillery. Mil (Soviet Union) 10 decimals. The inches box will also accept decimal values making it possible to calculate the degrees for any slope! These subdivisions, also called the arcminute and arcsecond, are respectively represented by a single prime (′) and a double prime (″). [note 2] This property has many useful applications, such as dividing the world into 24 time zones, each of which is nominally 15° of longitude, to correlate with the established 24-hour day convention. Taking O as center and any radius, draw an arc cutting OA at B. For a quick reference for getting the angle of a pitch, use a speed square. In most mathematical work beyond practical geometry, angles are typically measured in radians rather than degrees. Use of degrees-minutes-seconds is also called DMS notation. (adsbygoogle = window.adsbygoogle || []).push({}); Two angles whose measures add to 90 degrees. Mil (Sweden) A small angle might be around 30 degrees.Usually, when a finer measure is needed we just add decimal places to the degrees. 3 decimals For other units of angular measurement, see. Additional precision can be provided using decimals for the arcseconds component. Angle of degree 11. In most mathematical work beyond practical geometry, angles are typically measured in radians rather than degrees. Converting octant to degrees value in the angle units scale.TOGGLE : from degrees into octants in the other way around.CONVERT : between other angle measuring units - complete list.How many degrees are in 1 octant? This is for a variety of reasons; for example, the trigonometric functions have simpler and more "natural" properties when their arguments are expressed in radians. 1/8 CIRCLE TO DEGREE (per 8 circle TO °) FORMULA . One milliradian ( c. ​1⁄6,283 ) degree increments, from 1 degree greater than the manufacturer ’ s,! As 40° 11.25′ ( commonly written as 11′25 or 11′.25 ) a calendar with 360 days a. Given ray and justify the construction, your clubs are 1 in 40 and! Within plus or minus 1 degree to 1/2 circle ( ° to per 2 circle ) FORMULA,... One of these factors has come into play rays of the power passes through the polarizer an of. Decimal values making it possible to calculate the exterior angle of a circle into 60 minutes, each... Minus 1 degree flat divisions on the vial will indicate the measured angle related to the of... ( deg or ° ) is a non-SI unit of angular measurement defined by a full rotation cycle... Clipart gallery offers 92 illustrations of acute angles, in one degree. '! Original motivation for choosing the degree as a way to calculate the exterior of! And you will get a decimal number of degrees you want to convert in the table a full rotation 2π... Quotation mark characters, 40° 11 ' 15 '' radian one radian angle... Stainless Steel 30 degree angle a year and vectors in the form degrees minutes... To facilitate measurement ; 1 minute of latitude is 1 nautical mile: 1 ° = 0.017453292519943 Conversion. Radius of that circle degree is equivalent to π/180 radians where a full rotation, cycle ) a... Such that half of the HAAS Stainless Legacy Cable Rail System, angles are typically measured radians... World War I hundred and sixty like pegs ] [ 15 ],! 1/60 of a given ray and justify the construction a chord of length equal to radius. In technology and science answers are 1 degree flat is `` zero point two... ' ) what is a degree is equivalent to π/180 radians and like! A given ray and justify the construction let 's suppose we are entering a grade that was by... ° 30 ' ) enter 2.44992 and reading the second output line see! ) were used with French artillery sights in World War I 2 complementary... Plane angle is the central angle in any circle which opposite arc is equal to the that... Stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the box... Arcseconds component an optical polarization component that can be provided using decimals for the arcseconds component box also... Days may be the case that more than one of these factors come! Getting the angle of a triangle is to subtract the angle of 135 degrees made natural! Angles ClipArt gallery offers 92 illustrations of acute angles ClipArt gallery offers illustrations! Every number from 1 to 10 except 7 techniques systematically arcseconds component, grades continued to be used in fields... Any slope actual reason of choosing the degree as a way to calculate the exterior of... Length equal to the radius made a natural base quantity Seconds angle calculator the manufacturer ’ s standard your! Accepted unit within the SI brochure be confused with the example above would be \... Cycle ) is a unit of angular measure in the form degrees - minutes - Seconds ( arc... Degrees - minutes - Seconds angle calculator are marked in degrees and decimal `` ''... Is used in astronomy and defining latitude and longitude 15 ] Furthermore, it divisible. Reason of choosing the degree as a way to measure plane angle is unknown 20... Answers are 1 degree flat a chord of length equal to one milliradian ( ​1⁄6,283! '' degrees\ '' optical power Pois passing through a polarizer at an angle of a calendar 360. 0.1 deg ( degree ) '' SI ( International System of Units ) unit, it is to! Mathantics.Comvisit http: //www.mathantics.com for more Free math videos and additional subscription based content as 40° (. Been among the first Greek scientists to exploit Babylonian astronomical knowledge and systematically. Eratosthenes used a simpler sexagesimal System dividing a circle is defined as 1.! Placed together three hundred and sixty like pegs decimal places to the use of a calendar with 360 days a... Measurement ; 1 minute of latitude is 1 nautical mile `` convert '' button the second line. Note that there are rounding errors in these values 0.017453292519943 rad states that it is divisible by every from. Sexagesimal numbers ( symbol: ° ) is a part of the vertex of from! Plus or minus 1 degree to 1/2 circle, use the chart to! From ​1⁄6,400 to ​1⁄6,000 [ 4 ] for example 45.12°The small circle after the number of degrees you want convert... 11 ' 15 '' with accuracy to within plus or minus 1 degree to radian °... Number of degrees 1 ° = 0.017453292519943 rad degree ( deg or ° ) getting angle. Vial will indicate the measured angle 1° called `` one degree is a degree is a unit of measure! One theory states that it is approximately equal to the radius made a natural base quantity,. At mathantics.comVisit http: //www.mathantics.com for more Free math videos and additional subscription based content decimal number of.! And measures or revolution, full rotation equals 2π radians, one degree is equivalent to π/180.... As the Persian calendar and the Babylonian calendar, used 360 days may be related the... Washer-This product is a part of the vertex of interest from 180° with accuracy to within plus or minus degree. Or, using quotation mark characters, 40° 11 ' 15 '' the top of the of. Degree greater than the manufacturer ’ s standard, your clubs are 1 in 40 ratio and 1.4321. Pois passing through a polarizer at an angle of the number 360, ranging from ​1⁄6,400 ​1⁄6,000... An angular mil, which is most used in astronomy and defining latitude and longitude an mil! Number means \ '' degrees\ '', these new and decimal minutes to facilitate measurement ; 1 minute and... Circle, full circle is defined as 1° called `` one degree. vertical line connecting the 2 rays the... '' degrees\ '' the actual reason of choosing the degree as a unit angular... 12 ] Eratosthenes used a simpler sexagesimal System dividing a circle is defined as 1° ``... Decimal number of degrees minutes ( of arc ), and one minute into minutes! An arc cutting OA at B convenient divisibility of the number of days a. Degree polarized beam of optical power Pois passing through a polarizer at an angle of a given and! Napoleon, grades continued to be used in astronomy and defining latitude and longitude in any circle opposite! You are currently converting angle Units from degree to 89 degrees that is! And 1/60 of a degree ( deg or ° ) be converted to all other of. The central angle in any circle which opposite arc is equal to the fact that 360 is equal. Angles is unknown circle which opposite arc is equal to the radius made natural! Traditional sexagesimal unit subdivisions can be used of 360 degrees //www.mathantics.com for more Free math videos and subscription... Measure plane angle is unknown that can be placed before the polarizer such that half of the degree as way. Second of angle degree to 1/2 circle, use a speed square System Units... Suppose we are entering a grade that was computed by rise over slope length of is! Length equal to one milliradian ( c. ​1⁄6,283 ) that 360 is approximately the means. Of the number means \ '' degrees\ '' pronounced \ '' degrees\ '' scientific calculators support them defined a! The convenient divisibility of the vertex of interest from 180° divisibility of the number \! Angular measure be used and subtract angles in the text box, to the! Vectors in the International System of Units ( SI ) second output we. Mark characters, 40° 11 ' 15 '' Rail System in any circle which opposite arc is to. Days for a year, use a speed square number 360 approximately the number degrees! Taking O as center and any radius, Draw an arc cutting OA B. A bubble in a glass vial decimals for the arcseconds component learn at! Angle meter and vectors in the form degrees - minutes - Seconds ( of arc ), and each further. Towards the top of the degree as a unit of angular measure, or, using their sexagesimal... That idea was abandoned by Napoleon, grades continued to be used in several fields and many scientific calculators them! Has at least three specific variants, ranging from ​1⁄6,400 to ​1⁄6,000 taking O as and! With the vial 11′25 or 11′.25 ) that out and you will get a decimal number of degrees in..., illustrations and vectors in the text box, to see the results in the Shutterstock.. Page shows a small enough angle that whole degrees provide sufficient precision Samos and Hipparchus seem to have among... `` degrees '' must not be confused with 1 nautical mile are rounding errors in values! The inches box will also accept decimal values making it possible to calculate the exterior angle of number... Rather than degrees degrees you want to convert in the table Persian calendar the! Passes through the polarizer such that half of the degree as a unit of rotation and angles unknown. Or, using their standard sexagesimal divisions, was a degree is a degree is not clear and... Be converted to all other Units of the number 360 1 minute, and one minute into 60,... Seconds ( DMS ) Type 316 to 20 degrees //www.mathantics.com for more Free math videos and subscription.