Test your knowledge about angles Student activity Play

The angles of a polygon Student activity Play

The angles of a polygon Whiteboard exercise Play

The angles of a quadrilateral Student activity Play

The angles of a quadrilateral Animation Play

The area of a quadrilateral Whiteboard exercise Play

The area of a triangle Student activity Play

The area of the quadrilateral Whiteboard exercise Play

The exterior and interior angles of a quadrilateral Whiteboard exercise Play

The missing angle in a quadrilateral Whiteboard exercise Play

The missing angle of a quadrilateral Whiteboard exercise Play

The sum of the angles in a quadrilateral Simulation Play

The sum of the angles in the quadrilateral Whiteboard exercise Play

The sum of the exterior angles Animation Play

The sum of the interior angles of a quadrilateral – proof Animation Play

The two sides and an angle between them Whiteboard exercise Play

Theorem – assumptions and claim Student activity Play

Theorem – assumptions and claim Whiteboard exercise Play

Theorems and their assumptions in geometry Whiteboard exercise Play

Theorems and their assumptions in geometry Student activity Play

Trapeziums Student activity Play

Trapeziums Animation Play

Using tangent theorems Whiteboard exercise Play

Using tangent theorems Student activity Play

What is a perimeter? Animation Play