9.The area of a trapezoid is given as;
A={1/2h{b2 +b2}} where b2 and b2 are the lengths of the sides and h is the height
To express b2 in terms of A ,h, and b2 will be to make b2 the subject of the formular of trapezoid area.This will be
A={1/2h{b2 +b2}} ------ collect like terms and add
A={1/2h{2b2}} --------cancel the 2 in the 1/2 and that in brackets to get
A={h{b2}}
Divide both sides by h to remain with b2 on the right-hand side as
A/h = b2
So the expression will be :
b2 = A/h ---------answer
