Christopher's backyard is in the shape of a trapozoid. The bases of his backyard are 30 and 40 feet long. The area of his back yard is 525 square feet. Write and solve an equation to find the height of Christopher's back yard.
the formula for area of a trapezoid is 1/2h•(b+b) so let's plug in the numbers 1/2h•(70)=525 so divide both sides by 70 1/2h=7.5 now divide both sides by 0.5 h=15 so the height is 15.
