Discusses the properties and types of triangles, explaining that a triangle is a closed figure with three sides and angles. It categorizes triangles into equilateral, isosceles, scalene, obtuse ...

An isosceles triangle and a butterfly are examples of objects that exhibit reflective symmetry. Objects in 2-D have a line of symmetry; objects in 3-D have a plane of symmetry.

This huge, nearly isosceles triangle is composed of three of the brightest stars in the sky, each the brightest star in its own constellation.

Explore the triangle area formula, its derivation, and practical examples to master this essential geometric concept effortlessly.

There are lots of different types of polygon. Find out about quadrilaterals, triangles, polygons and circles in this KS2 Maths guide from BBC Bitesize.