The area of sector of a circle whose radius is 12 metro and whose angle at the center is 42° is?  Choose the correct choice: A) 56.8 m 2 B) 82.9 m 2 C) 52.8 m 2 D) 17.9 m 2 E) 72.9 m 2

Rationale: "42 / 360 * 22 / 7 * 12 * 12 = 52.8 m 2 answer : c"
Answer: C