# Circumference of a Semicircle?

## Answer

Circumference (C) of a circle = 2xpixr (2 times pi times r) where r is the radius and pi = 3.142. Since a semicircle is half a circle, the Circumference of a semicircle is therefore equal to half the Circumfernece of a circle, i.e. C of a semicircle= pi times r.
Q&A Related to "Circumference of a Semicircle?"
 circumference or perimeter of the semi-circle = (diameter*pi)/2 + diameter. http://wiki.answers.com/Q/What_is_the_circumferenc...
 2 pi r = circumference. 1/2 of that is pi x r. pi is 3.142 http://wiki.answers.com/Q/What+is+the+circumferenc...
 37.7 centimeters. I just took that test. ;). http://wiki.answers.com/Q/What_is_the_approximate_...
 Circumference = 2*pi*r. r = diameter/2. 20/2 = 10.------------------so, 2*pi(10). = 63. ====. http://wiki.answers.com/Q/What_is_the_circumferenc...
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