Question

A trapezoid has an area of 21 square centimeters and a height of 5 centimeters. What is the sum of base lengths of the trapezoid?

Answer 1

Answer:

8.4 cm

Step-by-step explanation:

Area of a trapezoid = $\frac{1}2(a+b)*h$ where (a+b) is the sum of the base lengths and h is the height.

Here we have

$21=\frac{1}2(a+b)*5\\42=(a+b)*5\\a+b=\frac{42}{5}=8.4$

So the sum of the base lengths is 8.4 cm.