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

Learn how to find the angles in right-angled triangles with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

This argument can be generalized to show that any three angle measures that sum to 180 degrees can make a triangle, and one immediate consequence is that it’s easy to find triangles whose angle ...