Acircular mirror has a diameter of 12 inches.
part a
what is the area, in square inches, of the mirror?
a. 6pi
b. 12pi
c. 36pi
d. 72pi

part b
a circular frame that is 3 inches wide surrounds the mirror.
what is the combined area, in square inches, of the circular mirror and the frame?
a. 9pi
b. 18pi
c, 54pi
d. 81pi

Part A

C. 36π

Part B

D. 81π

Step-by-step explanation:

The general formula for the area of a circle is:

A = πr², where 'r' represents the radius of the circle

Since the mirror has a diameter of 12 inches, the radius is half of that measure, or 6 inches.  So, for the area of just the mirror:

A = π6² = 36π in²

Adding a circular frame around the mirror increases the radius by another 3 inches:

6 in + 3 in  = 9 in

Given the new radius, use the same formula to calculate the overall area:

A = π9² = 81π in²

answer: n word

step-by-step explanation:

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