23. Prisms
• Prisms are named by the shape of their bases. For
example, a prism whose bases are in the shape of a
triangle is called a triangular prism; a prism whose
bases are in the shape of a rectangle is called a
rectangular prisms, etc.
24. Pyramids
• Similar to prisms, pyramids are also named by the
shapes of their bases. A pyramid whose base is in the
shape of a triangle is called a triangular pyramid.