Question

The diameter of a circle is 9 cm. What is the area of the circle? Use 3.14 for Pi

Answer 1

Area of a circle is defined as \[A=\pi r^2\]
The radius of a circle is half it's diameter. Since the diameter is 9cm, the radius is 4.5cm.
So, you're looking for \[A=\pi 4.5^2\]
Plug in 3.14 for pi, and solve.

Answer 2

use the formulae Area=pir^2, therefore A=(3.14)*(9cm)^2
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Answer 3

Ohhhh, Thank you! :)

Answer 4

whish equals 28.26cm^2

Answer 5

no I made a mistake r=4.5cm