 3rd Grade - Spatial geometry

# 5 - Spatial geometry

## Solids

Solids are particular shapes that lie in space. A solid has vertices, edges, and sides. For each solid, you can count its number of vertices, edges, and sides.

 Vertices Edges Sides   ## Examples of solids

 The cube The rectangular prism The prism   A cube is made of squares. A cube always has 6 sides, 8 vertices, and 12 edges. A rectangular prism is made of squares or rectangles. It has as many sides, vertices, and edges as a cube. A prism is made of 2 identical shapes linked together by segments. If the prism has a right angle we say it is a regular prism. On the drawing, the prism has triangular basis.

 The pyramid The cone The cylinder   A pyramid is made of a geometric form (triangle, square, hexagon,...) whose vertices are linked up to the same point. The pyramid above is a pyramid with rectangular basis. A cone is made of a circle whose line is linked to one point in space. A cylinder is made of two circles linked together by segments.

## Pattern of a solid

The pattern of a solid in space, is the drawing you can create on a sheet which will enable you, if you fold it, to form the solid.

Examples of patterns :

 Pattern of a cube Pattern of a rectangular prism Pattern of a prism   Pattern of a pyramid Pattern of a cone Pattern of a cylinder   >>> 3rd Grade Test >>>

Spatial geometry

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