Question

Answer please thanks

Answer 1

(2A /h) - b1 = b2

Explanation:

A = 1/2 h ( b1 + b2)

Multiply each side by 2

2A = 2*1/2 h ( b1 + b2)

2A = h ( b1 + b2)

Divide each side by h

2A/h= h/h ( b1 + b2)

2A/h= b1 + b2

Subtract b1 from each side

2A /h - b1 = b2