A triangle has an area of 72 square inches. If the base of the triangle has a length of 18 inches, what is the height of the triangle? Use the formula for the area of a triangle: Area = (base)(height)
Well, actually, the "formula" is:
A = (b*h) / 2 .....so we have.....
72 = (18 * h) / 2 multiply both sides by 2
144 = 18 * h divide both sides by 18
144/18 = h = 72/9 = 8 inches