Question

find the circumference and area of the circle. round to the nearest whole number.
25 yd

o a. 79 yd, 314 yd²
o b. 79 yd, 7,854 yd²
o c. 157 yd, 1,963 yd²
o d. 157 yd, 157 yd²

Explanation:

Step1: Recall circumference formula

The formula for the circumference of a circle is $C = 2\pi r$, where $r$ is the radius. Given $r = 25$ yd, then $C=2\times\pi\times25= 50\pi\approx50\times3.14 = 157$ yd.

Step2: Recall area formula

The formula for the area of a circle is $A=\pi r^{2}$. Substitute $r = 25$ yd into the formula, we get $A=\pi\times(25)^{2}=625\pi\approx625\times 3.14=1962.5\approx1963$ yd².

Answer:

C. 157 yd, 1,963 yd²