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How to identify different polygons

Part of Mathematics and Numeracy2d shapes

4 types of polygon
These shapes are all different, but they are all polygons.

Polygon party

Only 2D shapes with straight sides are invited to the polygon party.

Quadrilaterals

Quadrilaterals have 4 sides and their internal angles add up to 360°.

Square, rectangle, rhombus, parallelogram, kite and trapezium are all quadrilaterals.

Triangles

Triangles have 3 sides. Their internal angles add up to 180°.

The types of triangle are isosceles, equilateral, scalene, and right-angled.

Irregular polygons

Irregular polygons have sides of different lengths and angles.

Regular polygons

There are names for other shapes with sides of the same length.

These include pentagon which has 5 sides, hexagon has 6, heptagon has 7, and octagon has 8 sides.

4 types of polygon
These shapes are all different, but they are all polygons.

More on 2d shapes

Find out more by working through a topic