Question

question 8 of 10
what is the approximate area of a circle with a diameter of 10 in?

a. 15.7 in²
b. 31.4 in²
c. 314 in²
d. 78.5 in²

Explanation:

Step1: Find radius from diameter

Radius $r = \frac{diameter}{2} = \frac{10}{2} = 5$ in

Step2: Calculate area using formula

Area $A = \pi r^2 = 3.14 \times 5^2 = 3.14 \times 25 = 78.5$ in²

Answer:

D. 78.5 in²