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

1384.74

Step-by-step explanation:

the formula: radius^2 * pi.

The radius is 21.

21 squared is 441.

441*3.14 is 1384.74.

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!