1 / 15

Polyhedrons

Polyhedrons. An introduction to 3D Figures. What is a polyhedron?. 3 Dimensional figure Formed by polygons Takes up space. Parts of a polyhedron. Face: The flat polygonal surfaces “sides” Edge Where the faces meet Line segments Vertex Point of intersection of three or more edges

kaspar
Download Presentation

Polyhedrons

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

  11. Cone Define Parts Apex Radius Altitude Base • 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.

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

  13. Cylinder or not?

  14. Cylinder or not?

  15. Cylinder or not?

More Related