Solids: Three –Dimensional figures

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

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

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

4. 5 faces 8 edges 5 vertices 7 faces 15 edges 10 vertices Identify the number of faces, edges, and vertices on each three-dimensional figure. A. B. Faces + Vertices -2 = Edges

5. 6 faces 12 edges 8 vertices 5 faces 9 edges 6 vertices Identify the number of faces, edges, and vertices on each three-dimensional figure. A. B.

6. 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 Two main types of 3-D Figures

7. Prisms Rectangular Prism Pentagonal Prism

8. Pyramids Square Pyramid Triangular Pyramid

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

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

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

12. Let’s PlayName that Figure!

13. Cylinder

14. Triangular Prism

15. Cube

16. Square Pyramid

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

18. Pentagonal Pyramid

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