Question

Find the area of a circle with a circumference of \blueD{31.4}31.4start color #11accd, 31, point, 4, end color #11accd units.

Answer 1

Answer: The area is 78.5 square units.

Step-by-step explanation:

The circunference of our circle is equail to 31.4 units.

We know that the circunference of a circle of radius R is equal to:

Answer: C = 2*pi*R

Where pi = 3.14

here we have C = 31.4, then we can find the value of R:

C = 31.4 = 2*3.14*R

31.4/3.14 = 10 = 2*R

10/2 = 5 = R

now, the area of a circle is equal to:

A = pi*R^2 = 3.14*5^2 = 3.14*25 = 78.5 square units.