All About Shapes

2D shapes are

• solid shapes.

• flat shapes.

Polygons are 2D shapes made up of

• straight sides.

• curved sides.

A regular polygon has

• no equal sides and angles.

• all sides the same length and all angles the same size.

A quadrilateral is

• any shape with 4 sides.

• a type of triangle.

An equilateral triangle has

• 2 equal sides and 2 equal angles.

• 3 equal sides and 3 equal angles.

An isosceles triangle has

• 2 equal sides and 2 equal angles.

• 3 equal sides and 3 equal angles.

A triangle that has no equal sides and no equal angles is

• a scalene triangle.

• a special triangle.

Other examples of 2D shapes are

• pentagons and octagons.

• hexagons and cubes.

A shape has symmetry if, when folded,

• one side will fold exactly on the other side.

• one side will not fold exactly on the other side.

Lines of symmetry can be

• vertical, horizontal and diagonal.

• drawn in colour.