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.
To find the area of a circle, you use the formula A = πr^2, where r is the radius of the circle.
Since the diameter is 40 cm, the radius is half of that, which is 20 cm.
Plugging this into the formula, we get:
A = 3.14 x 20^2
A = 3.14 x 400
A = 1256
Therefore, the area of the circle is 1256 square centimeters.