Question

A circle has the circumference of 3.75 in. What is the diameter of the circle? (Use 3.14 for p. Round to the nearest tenth.) a. 1.9 in c. 0.6 in b. 1.2 in d. 7.5 in

Answer 1

b. 1.2 in

Explanation:

The formula of a circumference:

`C=d\pi`

d - diameter

We have C = 3.75 in.

Substitute:

`d\pi=3.75\qquad\text{use}\ \pi\approx3.14\\\\3.14d=3.75\qquad\text{divide both sides by 3.14}\\\\d=(3.75)/(3.14)\\\\d=(375)/(314)\\\\d\approx1.2\ in`