Question

the area of a trapezium is 1680 sq cm. One of the parallel sides is 64 cm and the perpendicular distance between the parallel sides is 28 cm. find the length of the other parallel side.​

Answer 1

The missing side length is 56

Explanation:

1680 = 1/2 · (64 + x) · 28

1680 · 2 = 28 · (64 + x)

3360 = 1792 + 28x

28x = 3360 - 1792

28x = 1568

x = 1568 ÷ 28

x = 56

Hope this helps.