area of a circle if radius is 7?

Question

Either enter an exact answer in terms of π or use 3.14 for Π and enter your answer as a decimal.

Answer 1

Here's what we know:

A_circle = πr² (Area of a circle is pi * radius squared)

r = 7

 

So we plug in the variable:

A = 7²π

A = 49π

 

If you want, you can replace π with 3.14, and then what you have there is:

A = 49 * 3.14 for your final answer.