Convert $180^{\circ}$ to radians.
A$\dfrac{\pi}{4}$
B$\dfrac{\pi}{2}$
C$\pi$
D$2\pi$
Answer & Solution
Correct answer: C. $\pi$
$180^{\circ}$ is a straight angle = $\pi$ radians. The fundamental relation: $\pi$ rad = $180^{\circ}$.
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