It would help if you proofread your questions before you posted them.
I assume that all of your "placements" are really placemats.
Area = π * r^2
d = 2r
Area of coaster = π * 3.5^2
Area of placemat = π * 7^2
Subtract area of coaster from area of placemat.
A circular coaster, with a diameter of 7 inches, is positioned on a white placement. The placement is a circle whose radius is equal to the diameter of the coaster. About how many square inches of the placemat are NOT covered by the coaster? Show your work.
1 answer
1 answer