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.
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
1 answer