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

#1**+2 **

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