A circle circumscribed about a regular pentagon Whiteboard exercise Play

A cyclic quadrilateral Student activity Play

A cyclic quadrilateral Whiteboard exercise Play

A polygon inscribed in a circle Student activity Play

A quadrilateral inscribed in a circle Whiteboard exercise Play

A quadrilateral pasture Whiteboard exercise Play

A regular arrangement of the substituents Animation Play

A regular pentagon Student activity Play

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

A star Animation Play

Angles in a cyclic quadrilateral Whiteboard exercise Play

Angles in a cyclic quadrilateral Student activity Play

Angles in a quadrilateral Simulation Play

Angles in simple polygons Whiteboard presentation Play

Angles in simple polygons Class activity Play

Angles in the quadrilateral Whiteboard exercise Play

Angles in triangles and quadrilaterals Class activity Play

Angles in triangles and quadrilaterals Whiteboard presentation Play

Angles of a quadrilateral Whiteboard exercise Play

Angles of a quadrilateral Student activity Play

Angles of a quadrilateral – proof Animation Play

Angles of a quadrilateral – revision Whiteboard exercise Play

Angles of a quadrilateral – revision Student activity Play

Angles of polygons Animation Play

Angles of polygons Student activity Play