Answer:
<h2>h = 15</h2>
Step-by-step explanation:
The formula of an area of a parallelogram:

b - side
h - height
We have b₁ = 18 and h₁ 10 and b₂ = 12.

Substitute:

<em>divide both sides by 12</em>

Answer:
56.52
Step-by-step explanation:
you do 3.14 times 18