Question

a trapezoid has an area of 81 square feet. The longer base of a trapezoid measures 15 ft and the height measures 6 ft. What is the length of the shorter base?

Answer 1

12

Explanation:

A = (a+b)/2 x h

Where : a is the longer base, b is the shorter base, and h is the height

Replace the numbers, we get : (15+b)/2 x 6 = 81
(15+b)/2 = 81/6 = 27/2
=> 15 + b = 27
b = 27 - 15 = 12

So, the shorter base's length is 12.