## anonymous 4 years ago ABCD is a trapezoid with AD = 5 ft, DC = 7 ft, and AB = 15 ft. Find the area of the trapezoid.

1. anonymous

I'm assuming this is an isosceles trapezoid. There is a special formula for this is analogous to Heron's formula. $s = 0.5(b _{1}^{} + b _{2}^{} + 2h)$$A = \sqrt{(s - b _{1}^{})(s-b _{2}^{})(s-h)^{2}}$

2. anonymous

that is analogous*

3. anonymous

You can use that to find your area.