Solid Figures

The sides of a solid figure are called faces.

Edges are formed when two faces meet. edge

A vertex is formed where three edges meet. Vertices is the plural form of vertex.

A prism is a solid figure whose bases lie in parallel planes and whose faces are parallelograms. base - bottom face of a solid figure

triangle triangular prism rectangle rectangular prism hexagon Prisms are named according to their bases. Base Name of Prism triangle triangular prism rectangle rectangular prism hexagon hexagonal prism

This is a special prism called a cube. All of its faces are squares.

A pyramid is a solid figure whose base is a polygon and whose faces are triangles with a vertex in common.

triangle triangular pyramid rectangle rectangular pyramid pentagon Pyramids are named according to their bases. Base Name of Pyramid triangle triangular pyramid rectangle rectangular pyramid pentagon pentagonal pyramid

How are pyramids different from prisms? A pyramid comes to a point or vertex. Math Tip

Not all solid figures have flat surfaces Not all solid figures have flat surfaces. Some 3-dimensional figures have curved surfaces. vertex Cone - a solid figure with one circular base and one vertex Cylinder - a solid figure with two congruent circular faces circular base