Trigonometry · Radians and the unit circle
How to Convert Radians to Degrees
Problem
Answer
Radians and degrees measure the same angles in different units. To go from radians to degrees, multiply by 180 over pi and cancel.
Step-by-step solution
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Multiply the radians by 180 over pi.
Why: A full turn is 2 pi radians or 360 degrees, so the factor between them is 180 over pi.
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Cancel pi and multiply.
Why: Pi appears on the top and the bottom, so it cancels.
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Divide to finish the conversion.
Why: 900 divided by 6 is 150.
Common mistakes
- Multiplying by pi over 180 instead of 180 over pi.
- Keeping the radian label in the answer. The result is in degrees.
- Cancelling pi but forgetting to divide by 6.
Practice problems
Use the same method. Work each problem on paper, then open the answer to check.
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