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Convert $45^{\circ}$ to radian measure.

A$\dfrac{\pi}{2}$
B$\dfrac{\pi}{4}$
C$\dfrac{\pi}{3}$
D$\dfrac{\pi}{6}$
Answer & Solution
Correct answer: B. $\dfrac{\pi}{4}$
$45^{\circ} = \dfrac{\pi}{180} \cdot 45 = \dfrac{\pi}{4}$.
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