Presentation on theme: "Solids: Three –Dimensional figures"— Presentation transcript:
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 Features of a 3-D figure Face- the flat surface of a figure VertexEdgeEdge- formed by two faces of a 3-D figure sharing a sideFacesVertex (plural:vertices)- the point at which three or more edges meet
4 Identify the number of faces, edges, and vertices on each three-dimensional figure. Faces + Vertices -2 = Edges5 faces8 edges5 vertices7 faces15 edges10 vertices
5 Identify the number of faces, edges, and vertices on each three-dimensional figure.
6 Two main types of 3-D Figures Prism:Has at least three faces that are rectanglesHas two congruent faces on the top and bottom called basesThe shape of the base tells what type of prism the figure isPyramid:Has at least three faces that are trianglesHas only one baseThe shape of the base tells what type of pyramid the figure is