Question

find the circumference of the figure if each unit on the graph measures 1 centimeter. round nearest tenth.
-2 -1 0 1 2 3 4 5
-1
(1, -1)
(3, -1)
-2
-3
-4

Explanation:

Step1: Find the radius

The distance between center $(1, - 1)$ and point $(3,-1)$ is $r = 2$ cm.

Step2: Use circumference formula

$C = 2\pi r=2\pi\times2 = 4\pi\approx12.6$ cm.

Answer:

$12.6$ cm