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9-4 Introduction to Three-Dimensional Figures

Vocabulary:

face--a flat surface

edge--a segment where two faces meet

vertex--a point where three or more edges meet

vertex edge

face

polyhedron--a 3-dimensional shape whose faces are all polygons (no curved edges).

9-4 Introduction to Three-Dimensional Figures

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9-4 Introduction to Three-Dimensional Figures

9-4 Introduction to Three-Dimensional Figures

Base: Pentagon

Faces: Triangles

Name: Pentagonal pyramid

Bases: Hexagons

Faces: Rectangles

Name: Hexagonal prism

Bases: Triangles

Faces: Rectangles

Name: Triangular prism

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9-4 Introduction to Three-Dimensional Figures

not a polyhedron; polyhedron; not a polyhedron;

cone hexagonal pyramid sphere

9-4 Introduction to Three-Dimensional Figures

Base: Triangle

Faces: Triangles

Name: Triangular pyramid

Bases: Squares

Faces: Rectangles

Name: Square prism

Base: Hexagon

Faces: Triangles

Name: Hexagonal pyramid

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9-4 Introduction to Three-Dimensional Figures

polyhedron;

octagonal prism

polyhedron;

triangular pyramid

not a polyhedron;

cylinder

9-4 Introduction to Three-Dimensional Figures