alleryThe relationship between degree measure and radian measure is:
Aπ radian = 360°
Bπ radian = 180°
C2π radian = 180°
Dπ radian = 90°
Answer & Solution
Correct answer: B. π radian = 180°
A full circle subtends 2π radians at the centre, which equals 360°.
So π radian = 180°.
**From this:** 1 radian = (180/π)° ≈ 57°16′ and 1° = π/180 radian ≈ 0.01746 radian.
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