Sam is building a model of an Egyptian pyramid out of cardboard. He plans to make a square base with an edge of 16 inches. The height of each triangular face is 9 inches. Determine the total amount of cardboard he will use for all surfaces in square inches.

An artist is making a sculpture consisting of three oblique triangular prisms that support a cube to install in a park in San Francisco. He is going to make the sculpture out of bronze and needs to know how much bronze to order and how much it is going to cost. He can order bronze for $1.13 per pound from a local supply yard. The bronze weighs 541 pounds per cubic foot. Each triangular prism has a height of 6 ft and a base area of 4 ft?. The cube that will go on top will have a side length of 3 ft. 1. What is the volume of the sculpture? 2. What is the total cost of the bronze?

the roof of a house has a shape of a pyramid with a square base of 8m sides. the height of this pyramid is 3m. mr. gordon wants to cover this roof with plywood worth $28 per m2. what will be the cost of this renovation.

The combined perimeter of the rectangle and rhombus is 92 inches. The model shows the dimensions of the rectangle. The rectangle is 19 in long and 13 inches wide. How many inches is the rhombus