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# Calculate the area of each circle described. Use pi=3.14 and round to the nearest hundredth.

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1.) The diameter of a circle is 3 cm.

2.) The radius of a circle is 2.5 cm.

3.) The radius of a circle is 6 in.

4.)  The diameterof a circle is 10 mm.

5.) The diameter of a circle is 16 in.

6.) The radius of a circle is 4 cm.

aschoenfeld  Aug 30, 2017
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#1
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I'll do a couple.......they are all pretty much the same

Area  = pi * radius^2

1. The diameter of a circle is 3 cm.

radius  =  diameter / 2

So radius  = 3 cm / 2  =  1.5 cm

Area = pi * (1.5)^2   =  2.25 pi  ≈ 7.07 cm^2

2.) The radius of a circle is 2.5 cm.

Area  =  pi * (2.5)^2  =  6.25 * pi  ≈  19.63 cm^2

CPhill  Aug 30, 2017
#2
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thanks!

aschoenfeld  Aug 30, 2017

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