1 Faces, Edges and Vertices Press Ctrl-A ©2009 G Dear – Not to be sold/Free to use Stage 4 Years 7 & 8

2 Faces, Edges, Vertices (1/5)Vertices Edges Faces End of Slide

3 Euler’s Rule Faces, Edges, Vertices Euler’s Rule (2/5)Cube HexagonalPyramid Solids Faces Vertices Edges F+V-E Cube Hexagonal Pyramid End of Slide

4 Platonic solid A regular polyhedron All sides are the same regular polygon. Icosahedron Tetrahedron Triangular Pyramid Octahedron Dodecahedron Polyhedra (3/5) Sides Press Hexahedron Cube Source: Wikipedia Common End of Slide

5 Parallel, Intersect, Skew (4/5) Parallel Lines same Parallel Lines are always the same distance apart. Perpendicular Lines intersect Perpendicular Lines always the intersect at right angles. Skew Linesintersect parallel Skew Lines do not intersect and are not parallel. End of Slide

6 Parallel, Intersect, Skew (5/5)Skew Intersecting Parallel End of Show