Name the Shape

circle square rectangle

triangle

pentagon

hexagon octagon

Triangle Names

a + b + c = 180°

Equilateral triangles have 3 equal sides and

3 equal angles.

a

a

Isosceles triangles have 2 equal sides and 2 equal angles.

60°

60° 60°

c

ab

The angles and sides of this triangle are all different.

It is a scalene triangle.

A triangle has 3 sides and 3 angles

obtuse angle

One angle is obtuse

Triangle Names

c

ab

This is an acute-angled triangle.a, b and c are all acute angles

This is an obtuse-angled triangle.

This is a right-angled triangle.

One angle is 90°.

90°

less than 90°greater than 90°

It can be split into 2 triangles.

A quadrilateral has 4 sides

The sum of the angles of any quadrilateral = 2 x 180° = 360°.

p + q + r + s = 360°

pq

r

s

Quadrilaterals

and 4 angles.

Special Quadrilaterals

These are trapezia

Trapezium

One pair of sides parallel

a

ab

b

Opposite angles equal

Special Quadrilaterals

ParallelogramOpposite sides parallelOpposite sides equal

These are parallelograms

Diagonals perpendicular

Unequal diagonals

Rhombus

Parallelogram with all sides equal

Special Quadrilaterals

These are rhombuses

Special Quadrilaterals

Parallelogram with perpendicular sides

Diagonals equal

Rectangle

Diagonals not perpendicular

These are rectangles

Diagonals at right angles

Diagonals equal

Special Quadrilaterals

Square

Rectangle with all sides equal

These are squares

Diagonals at right angles

Kite

Two pairs of adjacent sides equalUnequal diagonals

Special Quadrilaterals

These are kites

and 5 angles.

and 5 equal angles

A pentagon has 5 sides

Pentagons

A regular pentagonhas 5 equal sides

and 6 equal angles

A hexagon has 6 sides

Hexagons

and 6 angles.

A regular hexagon has 6 equal sides

and 8 equal angles

Octagons

and 8 angles.

An octagon has 8 sides

A regular octagon has 8 equal sides

cuboids

cylinders

cubes

triangular prism

3D Shapes

hexagonal prism