Question 136
What is the size of the central angle belonging to a circular arc whose length equals the radius of the circle?
(A) $\frac{45^{\circ}}{\pi}$
(B) $\frac{90^{\circ}}{\pi}$
(C) $\frac{135^{\circ}}{\pi}$
(D) $\frac{180^{\circ}}{\pi}$
(E) $\frac{270^{\circ}}{\pi}$
(A) $\frac{45^{\circ}}{\pi}$
(B) $\frac{90^{\circ}}{\pi}$
(C) $\frac{135^{\circ}}{\pi}$
(D) $\frac{180^{\circ}}{\pi}$
(E) $\frac{270^{\circ}}{\pi}$