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The perimeter of the semi-circle is half the circumference plus the diameter.
In this case, we have three as the radius, so the diameter is 6 inches long, and the perimeter around the arc is 2π∗32=3π. Thus, the answer is 3π+6.
Semi-circle perimeter = pi * radius =
pi * 3 =
3 pi cm
EDIT....see tertre's answer below.....mine is flawed!!!
Ah....thanks, Tetre.....I always forget that they want the perimeter of the whole sector....not just the "curved" part
Best Answer !!!
I sometimes forget that, too!
Thank you!
