Question

Isosceles trapezoid EFGH has area 80 cm ^2, height 20 cm and legs 22 cm. One of the bases is 5 cm. How long is the remaining base ?

Answer 1

3

Explanation:

A =
`(base1 + base2)/(2)` x h Formula

`(base1 + 5)/(2)` x 20 = 80 Substitution

`(base1 + 5)/(2)` = 4 Work (divide by 20, multiply by 2, subtract 5)

base1 + 5 = 8

base1 = 3 Solution