The cosine – reducing angles Student activity Play

The derivation of the formula Animation Play

The descriptive property method Student activity Play

The descriptive property method Simulation Play

The determination of the empirical formula of a compound Whiteboard exercise Play

The determination of the empirical formula of ammonia Animation Play

The diagonal of a square Student activity Play

The diameter of the tree Animation Play

The difference of squares Animation Play

The discriminant of a quadratic equation Student activity Play

The distance between the centres of circles Student activity Play

The distance between the points Animation Play

The distance formula Animation Play

The distance formula Student activity Play

The distance formula in 3-dimensional space Whiteboard exercise Play

The distance formula – applications Student activity Play

The empirical formula of ethanoic acid Animation Play

The equation of a circle with centre at an arbitrary point Student activity Play

The equation of a tangent to a circle Student activity Play

The equilateral triangle Student activity Play

The expression for the nth term Class activity Play

The expression for the nth term Whiteboard presentation Play

The formula and its graph Whiteboard exercise Play

The formula and the graph Student activity Play

The formula for binomial coefficients Student activity Play