A collection of three worksheets. Two worksheets on classifying angles as right, straight, acute, obtuse or reflex and a worksheet on determining the type of a given triangle with respect to its interior angles (acute-angled, obtuse-angled, right-angled) and with respect to its sides (scalene, isosceles, equilateral). Detailed solutions are included.

Three worksheets on the triangle angle theorem and triangle exterior angle theorem. The exercises require to find missing angles by using the two theorems. Detailed solutions are included. There is one worksheet on each theorem and one worksheet on both theorems.