Question

A trapezoid has an area of 226.8 square millimeters. One base is 9 millimeters long. The height measures 18.9 millimeters. What is the length of the other base?

Answer 1

Explanation:

area of trapezoid = 1/2 (a + b) h

where 'a' and 'b' are parallel sides.

and 'h' is height.

area = 1/2 (9 + b) 18.9

226.8 = 1/2 (9 + b) 18.9

226.8 × 2 = (9 + b) 18.9

453.6 = (9 + b) 18.9

453.6 ÷ 18.9 = (9 + b)

24 = (9 + b)

b = 15 millimeters