The dimensions are the b and h, it doesn't matter which is which since you're multiplying. isosceles: A = 1/2(20)(35) = 350ft² equilateral: A = 1/2(40)(60) = 1200ft²
Multiply each by 5ft to get the volume 350ft² * 5ft = 1750ft³ 1200ft² * 5ft = 6000ft³
