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Introduction to 3-Dimensional Figures

Introduction to 3-Dimensional Figures. Geometric Solids. A three dimensional figure that has three dimensions: length, width, and height. cylinder. Rectangular prism. cube. pyramid. cone. Some Vocabulary. Face: A flat surface of a three-dimensional figure.

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Introduction to 3-Dimensional Figures

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  1. Introduction to 3-Dimensional Figures

  2. Geometric Solids A three dimensional figure that has three dimensions: length, width, and height. cylinder Rectangular prism cube pyramid cone

  3. Some Vocabulary • Face: A flat surface of a three-dimensional figure. • Edge: The line where two faces meet. • Vertex: Thepoint where three or more edges meet. • Polyhedron: A 3-D figure whose faces are all polygons. • Base: The face that is used to name a polyhedron.

  4. Pentagonal Prism Vertices (points) 10 Edges (lines) 15 Faces (planes) 7

  5. Naming Polyhedrons Step 1: Identify the base of the solid. It will be used to name the polyhedron. Hint: It will be the name of a polygon. Step 2: Determine if the object is a prism or pyramid. Step 3: Name the polyhedron.

  6. Naming Solids: Step 1 Identify the base of the solid. It will be used to name the polyhedron. Hint: It will be the name of a polygon. Example: There is one base, and it is a pentagon.

  7. Naming Solids: Step 2 Determine if the object is a prism or pyramid.

  8. Naming Solids: Step 2 Example: There is one base that is a polygon and there are five triangularfaces, which makes it a pyramid.

  9. Naming Solids: Step 3 Name the polyhedron Combine what you found in Steps 1 and 2 to name the figure. Example: Base: Pentagon Faces: Pyramid Name: Pentagonal Pyramid

  10. Not Polyhedrons Other three-dimensional figures include cylinders, cones, and spheres. These figures are not polyhedrons because they are not made of faces that are all polygons. Cylinders Cones Spheres

  11. Naming Solids Activity • Use the list of names of the solids on the board. Work in your groups to match the name of the solid to its picture on your worksheet. • Once you have discovered the names of each solid, work in your groups to fill in the rest of the chart. • HINT: use your notes on steps to naming solids. You will have 15 minutes. Make sure to watch the clock. GOOD LUCK!

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