Find the area of a circle with a diameter of 40 cm. Use 3.14 for π
and express your answer to the tenths place. Use the formula sheet provided. (1 point)
Responses
1,256 cm2
1,256 cm2
5,024 cm2
5,024 cm2
125.6 cm2
125.6 cm2
62.8 cm2
The formula for the area of a circle is A = πr^2, where r is the radius of the circle.
Given that the diameter is 40 cm, the radius (r) is half of that, so r = 20 cm.
Substitute r = 20 cm and π = 3.14 into the formula:
A = 3.14 * (20)^2
A = 3.14 * 400
A = 1256 cm^2
Therefore, the correct answer is 1,256 cm^2.