What is the area of a circle with a diameter 42 inches

Circle Area Formula: A = πr²

First, lets find the radius of the circle (we can just divide the diameter by two).

42 / 2 = 21in.

Second, lets solve for the area.

A = π(21)²

A = π(441)

A = 1,384.74 inches.

Note that some questions ask for the answer to be written before pi is solved so if you need it then it can also be 441π.

Best of Luck!

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