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

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.

PolygonsTwo-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?

Polygons

A Hexagon

Polygons

How many lines of symmetry has a Hexagon?

1 2

3

4

5

6

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?

2

3 4

5

1Polygons

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?

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

How many lines of symmetry?

Heptagon Octagon

Look at these shapes

RegularShapes

Lines of symmetry

Heptagon Octagon

7 8

RegularShapes

Lines of symmetry

Heptagon Octagon

7 8

RegularShapes