Find the area of a circle, counting π = 3.14, if the circumference is 12.56 dm.

Let’s calculate the area of a circle if the length is 12.56 dm.

To begin with, we find the radius, knowing the length l = 2 P R, where P is a constant = 3, 14; R is the radius.

Let us express from the formula R = l \ 2П.

R = 12, 56 \ 2 * 3, 14.

R = 12, 56 \ 6, 28.

R = 2 dm.

And the area of the circle is. S = P R 2.

Substitute in the formula and get.

S = 3, 14 * 2 2.

S = 12.56 dm 2

Answer: the area of the circle is 12.56 dm 2.