New Page 1 Chapter 12 12.1 Surface Areas of Prisms 12.2 Surface Areas of Pyramids 12.1 Surface Areas of Prisms A prism is a 3 dimensional figure with 2 congruent parallel polygons which are called bases and sides that connect the bases that are parallelograms.
Right prisms have sides that are rectangles.
This will bisect the base . Use the Pythagorean theorem to find the height of the triangle. The middle section becomes a rectangle with a base of 10. This leaves 24 units of the 34 on the base to divide evenly between the two end triangles. Use the Pythagorean theorem on the triangle to solve for the height which results in 9.