A semicircle has a radius of 12. What is the approximate perimeter of the semicircle?
Choose the correct choice from the following options
A) 58	B) 62	C) 66	D) 70	E) 74

Rationale: "the perimeter of a circle is 2 * pi * r . the perimeter of a semicircle is 2 * pi * r / 2 + 2 r = pi * r + 2 r the perimeter is pi * 12 + 2 * 12 which is about 62 . the answer is b ."
Answer: B