Atrapezoid has an area of 18 square miles. the bases are 5 miles and 7 miles. what is the height of the trapezoid?

Area (trapezoid)= (base ₁+base₂)*height/2
Area=18 miles²
base ₁=5 miles
base ₂=7 miles

18 miles²=(5 miles+7 miles)* height / 2
18 miles² * 2=(12 miles)* height
12 miles *  (height)=36 miles²
height=36 miles² / 12 miles=3 miles.

Solution: heigth=3 miles.

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