algebra
posted by terry on .
Construction. An Aframe cabin has a triangular front with a base of 30 ft and a
height of 20 ft. If the front is to be glass that costs $3 per square foot, what will the
glass cost?

Area of triangle is (1/2)x base x height
you have those dimensions, find the area, then multiply that by 3
did you get $900 ?