polygons shapes with many sides! two-dimensional shapes (2d) these shapes are flat and can only be...

Polygons Shapes with many sides!

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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.

Page 3: 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

PolygonsTwo-dimensional shapes

that have sides made from straight lines.

• E.g. triangles squares hexagons

Page 4: 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

Pentagon• A two-dimensional

shape with five straight sides and five angles.

Page 5: 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

Hexagon• A two-dimensional

shape with 6 straight sides and 6 angles.

Page 6: 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

Octagon• A two-dimensional

shape with 8 straight sides and 8 angles.

What shape is this?

Polygons

A Hexagon

Polygons

How many lines of symmetry has a Hexagon?

1 2

Polygons

Properties of a Regular Hexagon

Has 6 equal sides

Has 6 equal angles

Has 6 lines of symmetry Polygons

What shape is this?

Polygons

A Pentagon

Polygons

How many lines of symmetry has a Pentagon?

3 4

1Polygons

Page 14: 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

Properties of a Regular Pentagon

Has 5 equal sides

Has 5 equal angles

Has 5 lines of symmetry Polygons

Polygons

Shapes with many sides!

Polygons

Lines of Symmetry - Look at these shapes

Can you suggest a rule?

Page 17: 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

Regular shapes

All the sides are the same length

All the angles are equal

Have the same number of lines ofsymmetry as the number of sides

RegularShapes

Page 18: 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

How many lines of symmetry?

Heptagon Octagon

Look at these shapes

RegularShapes

Page 19: 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

Lines of symmetry

Heptagon Octagon

7 8

RegularShapes

Page 20: 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

Lines of symmetry

Heptagon Octagon

7 8

RegularShapes

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