Question

If the area of a circular cookie is 28.26 square inches, what is the APPROXIMATE circumference of the cookie? Use 3.14 for π.

75.2 in.
56.4 in.
37.6 in.
18.8 in.

Answer 1

Explanation:

c= 2(pi)r

Area = (pi)r^2

28.26 = (pi) r^2

r =
`√(9)` = 3

circumference = 2 (3.14) (3)

= 18.8 in

Answer 2

Answer: approx 18.8 in

Explanation:

The area of the circle is

S=π*R² (1) and the circumference of the circle is C= 2*π*R (2)

So using (1) R²=S/π=28.26/3.14=9

=> R= sqrt(9)

R=3 in

So using (2) calculate C=2*3.14*3=18.84 in or approx 18.8 in