Question

find the area of the circle. use 3.14 for the value of π. round your answer to the nearest tenth. dont forget to find the radius first before finding the area.

a. 98.5 in²
b. 16 in²
c. 326.8 in²
d. 817 in²

Explanation:

Answer:

1. First, find the radius:

• The diameter \(d = 10.2\) in. The radius \(r=\frac{d}{2}=\frac{10.2}{2}=5.1\) in.

1. Then, use the formula for the area of a circle \(A=\pi r^{2}\):

• Substitute \(\pi = 3.14\) and \(r = 5.1\) into the formula.
• \(A=3.14\times(5.1)^{2}=3.14\times26.01 = 81.6714\approx81.7\) in².
• So the answer is d. 81.7 in²