+128406 Notice that we can figure the area of this triangle in two ways
One of the bases = 20....and the height to this base = 12
So the area is (1/2) 20 * 12 = 120 units^2
Also.....the other base = 30 and the height of this base = h
So
Area of triangle = (1/2) * 30 * h
120 = 15 * h divide both sides by 15
8 ft = h
