A line parallel to a given line Student activity Play

A rhombus, a parallelogram and a trapezium in coordinates Whiteboard exercise Play

A trapezium and a kite – conclusions Whiteboard exercise Play

Addition of forces Class activity Play

Addition of forces by means of a parallelogram Whiteboard exercise Play

Addition of forces by means of a parallelogram Student activity Play

Addition of forces by means of a triangle Simulation Play

Addition of forces by means of a triangle Whiteboard exercise Play

Addition of forces by means of a triangle Student activity Play

Addition of vectors Whiteboard exercise Play

Addition of vectors Student activity Play

Angles and sides of quadrilaterals Student activity Play

Angles in a cyclic quadrilateral Student activity Play

Angles in simple polygons Class activity Play

Angles in simple polygons Whiteboard presentation Play

Angles of quadrilaterals Student activity Play

Areas of parallelograms Student activity Play

Areas of polygons Student activity Play

Areas of polygons Whiteboard presentation Play

Areas of polygons Class activity Play

Areas of polygons Whiteboard exercise Play

Areas of polygons made of parallelograms Whiteboard exercise Play

Areas of polygons made of parallelograms Student activity Play

Basic shapes – a parallelogram Whiteboard exercise Play

Basic shapes – a reminder Student activity Play