Population range and density Student activity Play

Problems involving properties of angles and parallel lines Class activity Play

Problems involving properties of angles and parallel lines Whiteboard presentation Play

Properties of angles in a trapezium Animation Play

Quadrantal angles Whiteboard exercise Play

Quadrantal angles Student activity Play

Radian measure of angles Animation Play

Reasoning with angles Whiteboard exercise Play

Reasoning with angles Whiteboard exercise Play

Reasoning with angles Student activity Play

Reasoning with angles Student activity Play

Reflex angles Animation Play

Reflex angles Student activity Play

Reflex angles – activity Whiteboard exercise Play

Regular polygons and their exterior angles Whiteboard exercise Play

Solving problems – the angles Whiteboard exercise Play

Sum of angles in a quadrilateral Animation Play

Sum of angles in a triangle Animation Play

Sum of angles in quadrilaterals Student activity Play

Sum of the angles in a cyclic quadrilateral Animation Play

Sum of the angles in a quadrilateral Simulation Play

Sum of the angles in a quadrilateral – proof Animation Play

Sum of the angles in a triangle – proof Animation Play

Sum of two adjacent angles of a parallelogram Animation Play

Supplementary, corresponding and alternate angles Whiteboard exercise Play