Question

Chris is making a poster for Bike Safety Week. The diameter of circle A is 14 in.

Answer 1

To calculate the area of a circle you need to square the radius and multiply by pi (3.14)


$A= \pi 7^{2}$ 

Your answer will be 156.86 inches

this video actually uses the same equation and is very helpful http://virtualnerd.com/geometry/length-area/circles-sectors-area/circle-area-from-diameter 

Answer 2

Answer:

30.772 in2.

Step-by-step explanation:

First, find the radius of circle A.

* in picture*

Next, use the formula and the radius of circle A to find the area of circle A.

*in picture*

Last, multiply the area of circle A by  to find the area of circle B.

*in picture*

Therefore, the area of circle B is 30.772 in2.