Polygons Shapes with many sides! Two-dimensional Shapes (2D) These shapes are flat and can only be drawn on paper. They have two dimensions – length.

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Presentation transcript:

Polygons Shapes with many sides!

Two-dimensional Shapes (2D) These shapes are flat and can only be drawn on paper. They have two dimensions – length and width. They are sometimes called plane shapes.

Polygons Two-dimensional shapes that have sides made from straight lines. E.g. triangles squares hexagons

Pentagon A two-dimensional shape with five straight sides and five angles.

Hexagon A two-dimensional shape with 6 straight sides and 6 angles.

Octagon A two-dimensional shape with 8 straight sides and 8 angles.

What shape is this?

A Hexagon

How many lines of symmetry has a Hexagon?

Properties of a Regular Hexagon  Has 6 equal sides  Has 6 equal angles  Has 6 lines of symmetry

What shape is this?

A Pentagon

How many lines of symmetry has a Pentagon?

Properties of a Regular Pentagon  Has 5 equal sides  Has 5 equal angles  Has 5 lines of symmetry

Polygons Shapes with many sides!

Lines of Symmetry - Look at these shapes Can you suggest a rule?

Regular shapes  All the sides are the same length  All the angles are equal  Have the same number of lines of symmetry as the number of sides

How many lines of symmetry? HeptagonOctagon Look at these shapes

Lines of symmetry HeptagonOctagon 78

Lines of symmetry HeptagonOctagon 78