How to identify different polygons

Polygon party

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


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

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


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.