What is the area of the trapezoid with height 10 units?

The surface area (sa) of a cube with a as the length of each of its sides is given by the formula . if the surface area is known, how can you rewrite the formula to find its side?

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?