3 February, 17:01
A circular mirror has a diameter of 12 inches.
What is the area, in square inches, of the mirror?
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?
3 February, 17:57
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
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» A circular 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.