1 / 15

1-7 Three-Dimensional Figures

1-7 Three-Dimensional Figures. What is a polyhedron? How are polyhedrons classified? What are Platonic solids?. You identified and named two-dimensional figures. Identify and name three-dimensional figures. Definitions.

erica
Download Presentation

1-7 Three-Dimensional Figures

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. 1-7 Three-Dimensional Figures What is a polyhedron? How are polyhedrons classified? What are Platonic solids?

  2. You identified and named two-dimensional figures. • Identify and name three-dimensional figures.

  3. Definitions A polyhedron is a solid with all flat surfaces that enclose a single region of space. A face is each flat surface of the polygon Faces are named in the same way as polygons. Edges are the line segments where the faces intersect. A vertex is the point where three or more edges meet. Polyhedrons or polyhedra are named by the shape of their bases and type of solid.

  4. p. 67

  5. Prisms and pyramids are Polyhedrons. Cylinders, cones and spheres are not.

  6. Bases The bases of the figure are the two parallel congruent faces of the three dimensional figure. BEWARE!! The figure may not be sitting on its base

  7. Naming polyhedrons Polyhedrons are named by the shape of their bases.

  8. Identify Solids Determine whether the solid is a polyhedron. Then identify the solid. If it is a polyhedron, name the bases, faces, edges, and vertices. The solid is formed by polygonal faces, so it is a polyhedron. The bases are rectangles. This solid is a rectangular prism. Answer: rectangular prism Bases: rectangles EFHG, ABDC Faces: rectangles FBDH, EACG, GCDH,EFBA, EFHG, ABDC Vertices: A, B, C, D, E, F, G, H

  9. Identify Solids Determine whether the solid is a polyhedron. Then identify the solid. If it is a polyhedron, name the bases, faces, edges, and vertices. The solid has a curved surface, so it is not a polyhedron. The base is a circle and there is one vertex. So, it is a cone. Answer:Base: circle TVertex:Wno faces or edges

  10. Identify the solid A. triangular prism B. triangular pyramid C. rectangular pyramid D. cone

  11. Platonic Solids

  12. Identify the solid A. cone B. cylinder C. pyramid D. polyhedron

  13. Identify the solid A. triangular pyramid B. pentagonal prism C. rectangular prism D. square pyramid

  14. What is a polyhedron? A polyhedron is a solid whose faces are polygons. • How are polyhedrons classified? Polyhedrons are named by the shape of their bases.

  15. Assignment 1-7 Page 70, 1, 2, 6-16, skip 12

More Related