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3D objects

3D objects. Thursday, 10 March 2011. Prisms. Definition : A prism is a solid in which the cross-sectional area remains the same. In other words the shape of the end is the same shape and size throughout the solid. Definition : The faces are the sides on a solid

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3D objects

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  1. 3D objects Thursday, 10 March 2011

  2. Prisms Definition: A prism is a solid in which the cross-sectional area remains the same. In other words the shape of the end is the same shape and size throughout the solid. Definition: The facesare the sides on a solid An edgeis where two faces meet. In other words the line drawn to represent a fold in the shape. Hidden edges are drawn with a dotted line. A Vertexis the name given for the corners. In other words where a number of edges meet. An edge face A Vertex

  3. 1. Cube Properties Number of faces = Number of edges = Number of vertices = Has planes of symmetry Has rotational symmetry from a given axes. 6 12 8

  4. Planes of symmetry

  5. 2. Cuboid Properties Number of faces = Number of edges = Number of vertices = Has planes of symmetry Has rotational symmetry from a given axes. 6 12 8

  6. Planes of symmetry

  7. 3. Triangular-based prism Properties Number of faces = Number of edges = Number of vertices = Has planes of symmetry Has rotational symmetry from a given axes. 5 9 6

  8. Planes of symmetry

  9. 4. Cylinder Properties Number of faces = Number of edges = Has planes of symmetry Has rotational symmetry from a given axes. 3 2

  10. Planes of symmetry

  11. Isometric paper Example Draw a cube with side 5cm

  12. Example Using the isometric paper draw a cuboid with dimensions 3cm by 4cm by 6cm

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