It categorizes triangles into equilateral, isosceles, scalene, obtuse, right, and acute based on their sides and angles. The video also covers the concept of congruency, demonstrating how two ...

An acute-angled triangle has three angles that are all less than 90°. A right-angled triangle has one angle that is exactly 90°. An obtuse-angled triangle has one angle that is greater than 90°.

Learn about properties of triangles with this BBC Bitesize Maths article. For students between the ages of 11 and 14.