Question

find the circumference.
c=? cm
c=πd=2πr
use π=3.14

Explanation:

Step1: Identify the radius

The radius \(r = 13\) cm.

Step2: Use the circumference formula \(C = 2\pi r\)

Substitute \(r = 13\) and \(\pi=3.14\) into the formula.
\(C = 2\times3.14\times13\)

Step3: Calculate the result

First, \(2\times3.14 = 6.28\). Then, \(6.28\times13=81.64\) cm.

Answer:

\(81.64\)