Question

1. the radius of a circle is 7 m. find its c terms of π. c = 2πr c = 2π(7) c = 14π 6. the circumference of a circle is 20π c diameter, in centimeters. 7. the diameter of a circle is 20 m. find circumference in terms of π.

Explanation:

Step1: Recall circumference - diameter formula

The formula for the circumference of a circle is $C = \pi d$, where $C$ is the circumference and $d$ is the diameter.

Step2: Substitute given diameter

Given $d = 20$ m, substitute into the formula: $C=\pi\times20 = 20\pi$ m.

for question 6:

Step1: Recall circumference - diameter formula

We know that $C=\pi d$. Given $C = 20\pi$ cm.

Step2: Solve for diameter

Since $C=\pi d$ and $C = 20\pi$, then $\pi d=20\pi$. Divide both sides by $\pi$: $d = 20$ cm.

Answer:

$20\pi$ m