Polygons Poster

A poster of polygon properties, from triangles to decagons

A simple and attractive poster that helps children understand the properties of key figures up to decagons. It shows regular and irregular polygons in an easy-to-follow format, which makes it a clear educational resource for the wall.

Every shape up to the decagon sits side by side, from triangles and quadrilaterals upwards: pupils can compare which ones have parallel sides. The difference lies in the pairing: regular polygons, with their equal sides, appear next to irregular versions of the same figure.

How each polygon shows its angle sum in geometry

Each image makes the point visually that the 'angle sum' is the sum of the triangles that make it up. Hands-on, the idea clicks when you split a pentagon into three triangles and see that 3 × 180° gives 540°, a result that underpins much of school geometry.

A polygon display for the classroom

In the classroom, this works well when students check polygon attributes against the poster while sorting or drawing their own shapes. For teachers, it gives a fixed point of reference throughout the teaching of angles and 2D shapes.

Poster size and chart format

• A1 poster (840 x 600 mm): large enough to read from the back of a classroom
• Printed on thick paper: holds its shape on a wall display
• Also available encapsulated for longer life: suited to busy corridors, maths rooms or frequent handling

You can put it up beside your shape work and ask a pupil to predict the decagon's angle sum before checking the chart.