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Prisms and Pyramids By Harrison

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Prism A prism is a shape that can lay on this side long ways or up ways that doesn't have a apex. Every prism has straight long face. A polygon is a 2-d shape that forms a prism.

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**Pyramids A pyramid has a apex that is a the top of the pyramid.**

The pyramid has a polygon as a bottom. The pyramids are named by their base.

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**The shapes of pyramids and prism**

The shapes that form the different types of prisms and pyramids are eighther 2 shapes or 1 shape. The also have a form all different. These prisms and pyramids are 3d shapes.

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Pentagonal prism A pentagonal prism has a pentagon on a face or side of the pentagonal prism. That forms into a pentagon. If you cut a pentagon in paper it’s a pentagonal prism. A pentagonal prism has 15 edges, 10 vertices and 7 faces.

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**Hexagonal prism A hexagonal prism is made out of two shapes.**

1. a rectangle witch makes the sides, you need 6. 2. a hexagon witch is for the base and top, you need 2. The hexagonal prism has 8 faces, 18 edges and 12 vertices.

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**Rectangular based pyramid**

A rectangular based pyramid has 2 shapes a rectangle and a triangle. 1. a rectangle has 4 edges, 4 vertices and 2 faces. 2. a triangle has 3 edges, 3 vertices and 2 faces. If you put them together you get a rectangular based pyramid that has 8 edges, 5 vertices and 5 faces.

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Square base pyramid A square based pyramid is formed by the square underneath the for triangles that are connected to the square underneath. A square based pyramid has 7 edges, 5 vertices and 5 faces.

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