All about Shapes

Ask Boffin!

Properties of Shapes

Number of sides

Number of angles

Number of lines of symmetry

Regular or irregular

Right Angles

Parallel lines

Shapes

Quadrilaterals

Triangles

Polygons

Key Words

Regular Shapes

Quadrilaterals

Shapes with 4 sides!

What shape is this?

Quadrilaterals

A Square

Quadrilaterals

How many lines of symmetry has a Square got?

1 23

4

Quadrilaterals

Properties of a Square

Has 4 equal sides

Has 4 equal angles

Each angle is a right angle

Has 4 lines of symmetry

Is a regular shape

Quadrilaterals

What shape is this?

Quadrilaterals

A Rectangle

Quadrilaterals

How many lines of symmetry has a Rectangle got?

1

2

Quadrilaterals

Properties of a Rectangle

Has 2 pairs of equal sides

Has 4 equal angles

Each angle is a right angle

Has 2 lines of symmetry

Is an irregular shape

Quadrilaterals

What shape is this?

Quadrilaterals

A Parallelogram

Quadrilaterals

How many lines of symmetry has a Parallelogram got?

None!

Quadrilaterals

Properties of a Parallelogram

Has 2 pairs of equal sides

Has 2 pairs of equal angles

Opposite sides are parallel

Has NO lines of symmetry

Is an irregular shape

Quadrilaterals

What shape is this?

Quadrilaterals

A Rhombus

Quadrilaterals

How many lines of symmetry has a Rhombus got?

21Quadrilaterals

Properties of a Rhombus

Has 4 equal sides

Has 2 pairs of equal angles

Opposite sides are parallel

Has 2 lines of symmetry

Is an irregular shape

Quadrilaterals

What shape is this?

Quadrilaterals

A Trapezium

Quadrilaterals

How many lines of symmetry has a Trapezium got?

None!

Quadrilaterals

How many lines of symmetry has thisTrapezium got?

1

Because these angles are equal.

Quadrilaterals

Properties of a Trapezium

Has unequal sides

One pair of opposite sides are parallel

Usually has NO lines of symmetry

Is an irregular shape

Quadrilaterals

What shape is this?

Quadrilaterals

A Kite

Quadrilaterals

How many lines of symmetry has a Kite got?

1Quadrilaterals

Properties of a Kite

Has 2 pairs of equal sides

Has 1 pair of equal angles

Equal sides are adjacent

Has 1 line of symmetry

Is an irregular shape

Quadrilaterals

Quadrilaterals

Shapes with 4 sides!

Quadrilaterals

Triangles

Shapes with 3 sides!

What type of triangle is this?

Triangles

An Equilateral Triangle

Triangles

How many lines of symmetry has an Equilateral Triangle got?

1

2 3

Triangles

Properties of an Equilateral Triangle

Has 3 equal sides

Has 3 equal angles

Each angle is a 60o angle

Has 3 lines of symmetry

Is a regular shape

Triangles

What type of triangle is this?

Triangles

An Isosceles Triangle

Triangles

How many lines of symmetry has an Isosceles Triangle got?

1Triangles

Properties of an Isosceles Triangle

Has 2 equal sides

Has 2 equal angles

Has 1 line of symmetry

Is an irregular shape

Triangles

What type of triangle is this?

Triangles

A Scalene Triangle

Triangles

None!

How many lines of symmetry has a Scalene Triangle got?

Triangles

Properties of an Scalene Triangle

Has NO equal sides

Has NO equal angles

Has NO lines of symmetry

Is an irregular shape

Triangles

What type of triangle is this?

Triangles

A Right Angled Triangle

Triangles

A Right Angled Triangle is different

It may be scalene or it may be isosceles

But it always has a right angle!

Triangles

Properties of a Right Angled Triangle

Has 1 right angle

May be an isosceles triangle

May have 1 line of symmetry

Is an irregular shape

It will be isosceles and have 1 line of symmetry when these 2

sides are equal.

Triangles

Triangles

Shapes with 3 sides!

Triangles

Key Words

Parallel

Perpendicular

Diagonal

Vertex

Bisect

Regular Shape

Regular Shape

Shapes are regular when

All their angles are the same size

All their sides are the same length

Parallel

Lines are parallel

when they are always the same distance apart.

Perpendicular

Lines are perpendicular

when they meet at right angles.

Vertex

A Vertex is a corner of a shape where two lines meet.

Diagonal

A Diagonal is a straight line that joins one corner (vertex) of a shape to a non adjacent corner (vertex)

Bisect

A line that cuts a shape exactly in half, Bisects the shape

Key Words

Parallel

Perpendicular

Diagonal

Vertex

Bisect

Regular Shape

Polygons

Shapes with many sides!

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