Geometry Shapes Revision. Drawing Cubes How many cubes? Draw a front, side and top view.

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Presentation transcript:

Geometry Shapes Revision

Drawing Cubes How many cubes? Draw a front, side and top view.

Parallel Lines Parallel lines never meet

Polygons Number of SidesPrefixName of Shape 3tritriangle 4quadquadrilateral 5pentpentagon 6hexhexagon 7heptheptagon 8octoctagon 9nonnonagon 10decdecagon

Polyhedra Prism Prisms are 3-D shapes that are the same shape all the way through.

Torus – 0 faces – 0 edges – 0 vertices Cylinder – 2 facesCube – 0 edges- 6 faces – 0 vertices- 12 edges - 8 vertices

cone Sphere pyramid

Nets

Platonic Solids

Euler’s Formula F + V – E =2 Eg: A shape has 10 faces and 8 vertices. How many edges does it have? ___ = ___ = 2 18 – 16 = 2, therefore it has 16 edges.

You Try It A shape has 4 vertices and 6 edges. How many faces does it have? What shape is it? A shape has 8 faces and 12 edges. How many vertices does it have? What shape is it?

Interior angles of a Triangle The angles in a triangle add up to 180° If x = 56° and y = 48°, determine z 180° – 56° – 48° = z = 76°

Exterior Angles of Triangles