1. Three-Dimensional Figures
Lesson 8.8
Three-Dimensional Figures

2. Solids: Three –Dimensional figures
EQ: How do you identify various three-dimensional figures? How do you distinguish between prisms and pyramids?

3. What are three-dimensional figures?
A three-dimensional figure encloses a part of space.
In other words it can hold something (water, air, etc.)

4. Features of a 3-D figure Face- the flat surface of a figure
Vertex
Edge
Edge- formed by two faces of a 3-D figure sharing a side
Faces
Vertex (plural:vertices)- the point at which three or more edges meet

5. Identify the number of faces, edges, and vertices on each three-dimensional figure.
Faces + Vertices -2 = Edges
5 faces
8 edges
5 vertices
7 faces
15 edges
10 vertices

6. Identify the number of faces, edges, and vertices on each three-dimensional figure.

7. Two main types of 3-D Figures
Prism:
Has at least three faces that are rectangles
Has two congruent faces on the top and bottom called bases
The shape of the base tells what type of prism the figure is
Pyramid:
Has at least three faces that are triangles
Has only one base
The shape of the base tells what type of pyramid the figure is

8. Prisms
Rectangular Prism
Pentagonal Prism

9. Pyramids
Square Pyramid
Triangular Pyramid

10. Other 3-D Figures
Cone- is a figure like a pyramid, but has a circular base and a curved surface

11. Other 3-D Figures
Cylinder- a curved figure with two circular bases

12. Other 3-D Figures
Sphere- a 3-D figure with no faces, bases, edges, or vertices

13. Let’s Play Name that Figure!

14. Cylinder

15. Triangular Prism

16. Cube

17. Square Pyramid

18. Okay…this last one is hard…Ready??

19. Pentagonal Pyramid

20. Polyhedron A 3-dimensional figure that has polygons as faces
Polygons must have straight lines!
Polyhedrons Not Polyhedrons