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http://prntscr.com/msnqaf

 Mar 3, 2019

Best Answer 

 #2
avatar+4322 
+2

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 \(\frac{2\pi*3}{2}=3\pi.\) Thus, the answer is \(\boxed{3\pi+6}.\)

 

smileysmiley

 Mar 3, 2019
 #1
avatar+102948 
+2

Semi-circle perimeter =   pi * radius   =

 

pi * 3 =

 

3 pi  cm

 

EDIT....see tertre's answer below.....mine is flawed!!!

 

 

cool cool cool

 Mar 3, 2019
edited by CPhill  Mar 3, 2019
 #2
avatar+4322 
+2
Best Answer

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 \(\frac{2\pi*3}{2}=3\pi.\) Thus, the answer is \(\boxed{3\pi+6}.\)

 

smileysmiley

tertre Mar 3, 2019
 #3
avatar+102948 
+1

Ah....thanks, Tetre.....I always forget that they want the perimeter of the whole sector....not just the "curved" part

 

Best Answer !!!

 

cool cool cool

CPhill  Mar 3, 2019
 #4
avatar+4322 
+1

I sometimes forget that, too! smiley

 

Thank you! laugh

tertre  Mar 3, 2019

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