Question

1. what is the formula for circumference? what is the circumference (perimeter) of the circle below? (include correct label) 7 in formula for circumference: circumference:

Explanation:

Step1: Recall the formula for circumference

The formula for the circumference of a circle is \(C = 2\pi r\) or \(C=\pi d\) (where \(r\) is the radius and \(d\) is the diameter).

Step2: Identify the radius and calculate

Given \(r = 7\) in. Using \(C = 2\pi r\), substitute \(r = 7\) into the formula.
\(C=2\times\pi\times7\)
\(C = 14\pi\) in. If we take \(\pi\approx3.14\), then \(C=14\times3.14 = 43.96\) in.

Answer:

Formula for Circumference: \(C = 2\pi r\) (or \(C=\pi d\))
Circumference: \(43.96\) in (if \(\pi = 3.14\)) or \(14\pi\) in.