Degrees and radians are the two primary units used to measure angles. A degree (denoted by °) represents the amount of rotation from the initial arm to the terminal arm, with a complete circle measuring 360°360°360°. When we divide a circle into 360360360 equal parts, each part equals 1 degree.
A radian is defined as the angle subtended at the center of a circle that corresponds to an arc length equal to the radius of the circle. When the arc length equals the radius, the angle is 111 radian. A complete circle represents 2π2\pi2π radians, which means 360∘=2π360^\circ = 2\pi360∘=2π radians. Some common conversions include: 180∘=π180^\circ = \pi180∘=π radians, 90∘=π290^\circ = \frac{\pi}{2}90∘=2π radians, and 60∘=π360^\circ = \frac{\pi}{3}60∘=3π radians.
Examples of Converting Degrees to Radians Example 1: Converting 60 Degrees to Radians Problem:Convert 606060 degrees to radians.
Step-by-step solution:Step 1, Recall the conversion formula. To convert degrees to radians, we multiply the angle in degrees by π180∘\frac{\pi}{180^\circ}180∘π.
Step 2, Substitute the given angle (60°60°60°) into the formula.
Angle in radians =60∘×π180∘= 60^\circ \times \frac{\pi}{180^\circ}=60∘×180∘π
Step 3, Simplify the expression.
Angle in radians =60∘×π180∘=60π180=π3= 60^\circ \times \frac{\pi}{180^\circ} = \frac{60\pi}{180} = \frac{\pi}{3}=60∘×180∘π=18060π=3π
Step 4, State the final answer. 606060 degrees is equal to π3\frac{\pi}{3}3π radians.
Example 2: Converting 90 Degrees to Radians Problem:Convert 909090 degrees to radians.
Step-by-step solution:Step 1, Use the conversion formula to change degrees to radians.
Angle in radians =Angle in degrees×π180∘= \text{Angle in degrees} \times \frac{\pi}{180^\circ}=Angle in degrees×180∘πStep 2, Put in the value 90°90°90° for the angle in degrees.
Angle in radians =90∘×π180∘= 90^\circ \times \frac{\pi}{180^\circ}=90∘×180∘πStep 3, Simplify the fraction. Angle in radians =90∘×π180∘=90π180=π2= 90^\circ \times \frac{\pi}{180^\circ} = \frac{90\pi}{180} = \frac{\pi}{2}=90∘×180∘π=18090π=2π
Step 4, Write the final answer. 909090 degrees equals π2\frac{\pi}{2}2π radians.
Example 3: Converting 200 Degrees to Radians Problem:Convert 200200200 degrees into radians.
Step-by-step solution:Step 1, Apply the degrees to radians conversion formula.
Angle in radians =Angle in degrees×π180∘= \text{Angle in degrees} \times \frac{\pi}{180^\circ}=Angle in degrees×180∘πStep 2, Fill in 200°200°200° as the angle in degrees.
Angle in radians =200∘×π180∘= 200^\circ \times \frac{\pi}{180^\circ}=200∘×180∘πStep 3, Work through the calculation step-by-step.
Angle in radians =200∘×π180∘=200π180= 200^\circ \times \frac{\pi}{180^\circ} = \frac{200\pi}{180}=200∘×180∘π=180200πStep 4, Simplify the fraction by dividing both numerator and denominator by their greatest common factor.
Angle in radians =200π180=20π18=10π9= \frac{200\pi}{180} = \frac{20\pi}{18} = \frac{10\pi}{9}=180200π=1820π=910πStep 5, State your answer. 200200200 degrees is equal to 10π9\frac{10\pi}{9}910π radians.
Comments(2)CCounselorTaraNovember 4, 2025This page on 60 degrees to radians is great! It helped my students grasp the concept easily. Thanks for the clear explanations!LLawyerDavidNovember 4, 2025This page on 60 degrees to radians was a great help! It made explaining the concept to my students so much easier. Thanks!Explore More TermsWhat Are Twin PrimesKm\H to M\SQuintillionRepeated SubtractionRight TriangleRotationView All Math TermsRecommended Interactive LessonsRound Numbers to the Nearest Hundred with the Rules3Math3.NBT.A.1Compare Same Denominator Fractions Using the Rules3Math3.NF.A.3dMultiply by 53Math3.OA.C.7Compare Same Denominator Fractions Using Pizza Models3Math3.NF.A.3dCompare Same Numerator Fractions Using Pizza Models3Math3.NF.A.3dDivide by 23Math3.OA.C.7View All Interactive LessonsRecommended VideosWord problems: add within 201Math1.OA.A.1Add Three Numbers1Math1.OA.B.3Estimate quotients (multi-digit by one-digit)4Math4.NBT.B.6Subtract Decimals To Hundredths5Math5.NBT.B.7Add Mixed Number With Unlike Denominators5Math5.NF.A.1Divide multi-digit numbers fluently6Math6.NS.B.2View All VideosRecommended WorksheetsCompare lengths indirectly1Math1.MD.A.1Tell Time To The Half Hour: Analog and Digital Clock1Math1.MD.B.3The Associative Property of Multiplication3Math3.OA.B.5Understand and Estimate Liquid Volume3Math3.MD.A.2Arrays and Multiplication3Math3.OA.A.1Add Tenths and Hundredths4Math4.NF.C.5View All WorksheetsRecommended Coloring PagesTropical fish with stripes swimming sidewaysPre-K – KAll SubjectsClownfish swimming in open water with a few bubbles around itPre-K – KAll SubjectsTuba standing upright with simple outlinesPre-K – KAll SubjectsOne Pillar Pagoda with Hanoi's skyline in the background1 – 2All SubjectsPig eating from a trough with a tree nearby1 – 2All SubjectsLarge cargo ship navigating through a storm with lightning and waves5 – 6All SubjectsView All Coloring PagesRecommended BlogsWhat's a Perfect SAT Score? A Guide for K-6 FamiliesNovember 4, 2025Understanding All Five ACT Sections for K-12 Success: A Guide for Parents, Teachers, and KidsOctober 17, 2025ACT Prep Plan: Creating a Personalized Strategy for High School SuccessOctober 10, 2025ACT vs SAT: Key Differences Parents and Students Should KnowOctober 9, 2025Mastering the ACT: Smart Time Management Tips for Test SuccessOctober 9, 2025Army ASVAB Composite Scores: A Parent's Guide to Military Career PathsOctober 7, 2025View All Blog PostsQUICK LINKSAbout UsPrivacy PolicyTerms of ServiceTOOLSHomework HelperGuide DesignerPodcast MakerPlan BuilderRESOURCESMath GlossaryEnglish GlossaryEnglish Language ArtsMathematicsScienceBook InsightsFun with WordsBlog© 2025 EDU.COM. All rights reserved.智能索引记录
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