Question

a triangular pane of glass has a height of 30 inches and an area of 270 square inches what is the length of the base of the pane?

Answer 1

Area =  base x height /2 or B x H divided by 2

270 sq in =   B x 30 in
                   ---------------
                            2
multiply equation by 2 the result is:

540 sq in = B x 30
B = 540/30
B = 18 sq in