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Published bySavanah Gaskell Modified over 2 years ago

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

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

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Features of a 3-D figure Faces Edge Vertex 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 Face- the flat surface of a figure

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Identify the number of faces, edges, and vertices on each three-dimensional figure. A. B. 5 faces8 edges5 vertices7 faces15 edges10 vertices Faces + Vertices -2 = Edges

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Identify the number of faces, edges, and vertices on each three-dimensional figure. A. B. 6 faces12 edges8 vertices5 faces9 edges6 vertices

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Two main types of 3-D Figures 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

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Prisms Rectangular Prism Pentagonal Prism

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Pyramids Square Pyramid Triangular Pyramid

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

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

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

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Let’s Play Name that Figure!

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Cylinder

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Triangular Prism

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Cube

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Square Pyramid

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Okay…this last one is hard…Ready??

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Pentagonal Pyramid

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Polyhedron A 3-dimensional figure that has polygons as faces Polygons must have straight lines! PolyhedronsNot Polyhedrons

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