Grade 12 · Math
Convert degrees to exact radians
Loading quiz…
Example & extra help
Try a sample
Convert 90° to radians. Give an exact answer.
- π rad
- π/4 rad
- 5π/2 rad
- π/2 rad
See the answer & why
π/2 rad
A half turn is 180° or π radians. Multiply 90 by π/180 to get π/2 rad.
A little hint: Multiply a degree measurement by π/180; simplify the numeric fraction.
Use the equivalence 180° = π radians, which represents a half turn.
All questions