Sum of the angles in a quadrilateral – proof Animation Play

Sum of the angles in a triangle – proof Animation Play

Sums of square roots of integers Student activity Play

Sums of square roots of integers Whiteboard exercise Play

Surds – the proof Animation Play

Surds – the proof (general case) Animation Play

The area of a triangle Animation Play

The circle and the equilateral triangle Student activity Play

The cumulative frequency polygon Student activity Play

The exterior angle of a regular polygon Student activity Play

The exterior angle of a regular polygon – proof (1) Animation Play

The exterior angle of a regular polygon – proof (2) Animation Play

The factor theorem – proof Animation Play

The graph of the cosine Student activity Play

The graph of the sine Student activity Play

The graph of the tangent Student activity Play

The Integer Root Theorem – proof Animation Play

The interior angle of a regular polygon Student activity Play

The interior angle of a regular polygon – proof (1) Animation Play

The interior angle of a regular polygon – proof (2) Animation Play

The length of the car Whiteboard exercise Play

The perimeter of the triangle and the diameter of the big circle Animation Play

The Rational Root Theorem – proof Animation Play

The sum of a positive number and its reciprocal Animation Play

The sum of the angles in a polygon Student activity Play