Answer:
h = 15
Step-by-step explanation:
The formula of an area of a parallelogram:
[tex]A=bh[/tex]
b - side
h - height
We have b₁ = 18 and h₁ 10 and b₂ = 12.
[tex]b_1h_1=b_2h[/tex]
Substitute:
[tex]12h=(18)(10)[/tex]
[tex]12h=180[/tex] divide both sides by 12
[tex]h=15[/tex]
