Angles in the quadrilateral Whiteboard exercise Play

Area of the isosceles trapezium Whiteboard exercise Play

Area of the trapezium Animation Play

Circle circumscribed about a quadrilateral Animation Play

Circle circumscribed about a quadrilateral Animation Play

Circle circumscribed about a triangle Animation Play

Circle inscribed into a parallelogram Simulation Play

Circle inscribed into a quadrilateral Simulation Play

Circle inscribed into a quadrilateral Student activity Play

Circle inscribed into a square Simulation Play

Circle inscribed into a triangle Simulation Play

Circle inscribed into a triangle Student activity Play

Circles inscribed and circumscribed Class activity Play

Circles inscribed and circumscribed Whiteboard presentation Play

Circles inscribed and circumscribed around a trapezium Student activity Play

Circles inscribed into quadrilaterals Simulation Play

Circles inscribed into quadrilaterals Student activity Play

Circumcircle Simulation Play

Circumscribed circles Whiteboard exercise Play

Circumscribed circles, inscribed polygons Animation Play

Circumscribed circles, inscribed polygons Student activity Play

Circumscribed polygons Animation Play

Construction of a circle circumscribed about a quadrilateral Student activity Play

Construction of a circle circumscribed about a quadrilateral Simulation Play

Construction of a circle circumscribed about a triangle Student activity Play

Construction of a circle inscribed into a quadrilateral Animation Play

Construction of a circle inscribed into a triangle Animation Play

Cyclic quadrilaterals Simulation Play

Cyclic quadrilaterals Whiteboard exercise Play

Cyclic quadrilaterals Student activity Play