Question

find the perimeter. include the unit.
5 cm
7 cm
12 cm
9 cm
10 cm

Explanation:

Step1: Sum all the side lengths

$$5 + 12+10 + 9+7$$

Step2: Calculate the sum

$$5+12 = 17$$
$$17+10=27$$
$$27 + 9=36$$
$$36+7 = 43$$

Answer:

$43\mathrm{cm}$