The circumference of a circle is 78.12 cm. A student was asked to approximate the area of the circle.
incorrectly said the area of the circle is about 972 cm squared. What is the approximate area of the circle? Use 3.14 for pi What mistake might the student have made?
(Round the final answer to the nearest whole number as needed. Round all intermediate values to the nearest thousandth as needed.)
I would approximate the radius as ≈ 13 cm
So....the estimated area = pi * (13)^2 = 169 pi ≈ 170 * 3 ≈ 510 cm^3
The true area is pi *(78.12/ [2pi])^2 ≈ 486 cm^2
[ Don't see what error the student might have made ]