A semicircle has a radius of 12. What is the approximate perimeter of the semicircle?	Choices:  A) 58  B) 62  C) 66  D) 70  E) 74
The perimeter of a circle is 2*pi*r.   The perimeter of a semicircle is 2*pi*r/2 + 2r = pi*r + 2r   The perimeter is pi*12 + 2*12 which is about 62.   The answer is 62.
<result>B</result>
A semicircle has a radius of 12. What is the approximate perimeter of the semicircle?