1. An introduction to 3D Figures
Polyhedrons
An introduction to 3D Figures

2. What is a polyhedron? 3 Dimensional figure Formed by polygons
Takes up space

3. Parts of a polyhedron Face: Edge Vertex The flat polygonal surfaces
“sides”
Edge
Where the faces meet
Line segments
Vertex
Point of intersection of three or more edges
Where line segments meet

4. Prisms Has two bases Faces Right Prisms Oblique Prisms Polygons
Congruent
Parallel
Faces
Connect the bases
Height is the altitude (perpendicular distance between the bases)
Right Prisms
Faces are perpendicular to the bases
Height=altitude= perpendicular distance
Oblique Prisms
Faces are NOT perpendicular

5. Pyramids Only one base Base determines type of pyramid
Has faces that meet at a common vertexes
Faces are always triangles

6. Practice Identify the figure. Name the bases. Name the lateral faces.
Name the edges.
Name an altitude.

7. Practice Identify the figure. Name the bases. Name the lateral faces.
Name the edges.
Name an altitude.

8. Practice Identify the figure. Name the bases. Name the lateral faces.
Name the edges.
Name an altitude.

9. Curved Surface Solids
An Introduction to Cylinders, Cones, and Spheres

10. Cylinder Define Parts Bases
Congruent
Parallel
Circles
If line connecting the bases is perpendicular to the bases, then it is a right cylinder, if not, its oblique.
Axis (Altitude)
Radius

11. Cone Define Parts Has one circular base
Lateral surface meets at a vertex called an apex
Right Cone: when line from apex to base is perpendicular to the base
Oblique Cone: Not perpendicular. Height is still the altitude.
Apex
Radius
Altitude
Base

12. Sphere Define: Parts A set of all points from a given point in space.
How is that different from a circle?
Center
Radius
Hemisphere
Great Circle

13. Cylinder or not?

14. Cylinder or not?

15. Cylinder or not?