Question

Can you help me with this question?

Answer 1

BC = 21 cm

Explanation:

The formula for the area of a trapezoid is

`A=(a+b)/(2) h`

So, if we know, a, h, and A, we can them solve for b

`b=(2A)/(h) -a`

So plugging this into the formula, we get

`b=(2(503.25))/(18.3) - 34\\\\b=(1006.5)/(18.3) - 34\\\\b=55 - 34\\\\b=21`