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+1
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avatar+27 

please work out perimeter.  thank you

 Feb 15, 2020
 #1
avatar+9681 
+2

please work out perimeter

 

Hi newsier!

 

\(P=(d\cdot \pi)/2 +d=(10\cdot 3.142)/2+10\)

\(P=25.71\)

laugh  !

 Feb 15, 2020
edited by asinus  Feb 15, 2020
 #2
avatar+818 
0

You can do it; it's easy.laugh

 Feb 15, 2020
 #4
avatar+595 
+1

It's not easy if you don't know how to do it.

AnimalMaster  Feb 16, 2020
 #3
avatar+595 
+1

Dunno if this is correct:

 

We know the perimeter of a circle (or circumference) is \(2\pi R\). So that means if we want to find the area of a semi-circle, we have to divide the perimeter by 2:

 

Radius (R) = 5.

 

So it's 2 * 3.142 * 5 = 31.42. 

 

We have to divide this by 2 so we can get our final answer:

 

31.42 / 2 = 15.71.

 

Ahh I noticed why mine was incorrect, I only did the curvy side and forgot about the bottom:

 

15.71 + 10 = 25.71

 Feb 15, 2020
edited by AnimalMaster  Feb 15, 2020
edited by AnimalMaster  Feb 15, 2020

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