1. Solid Figures

2. The sides of a solid figure are called faces.

3. Edges are formed
when two faces meet.
edge

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

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

6. 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

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

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

9. 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

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

11. 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