The radius of a semi circle is 6.6 cm then its perimeter is?  Answers:  A) 32.7  B) 32.4  C) 22.4  D) 33.9  E) 32.1
36/7 r = 6.6 = 33.9   Answer:33.9
<result>D</result>
The radius of a semi circle is 6.6 cm then its perimeter is?