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:
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.
