Angles on a line Whiteboard exercise Play

Angles on a straight line and angles round a point Student activity Play

Angular speed Whiteboard exercise Play

Angular speed Student activity Play

Another form of the equation of the circle Student activity Play

Another form of the equation of the circle Animation Play

Application in geometry Whiteboard exercise Play

Application in geometry Student activity Play

Application of the Pythagorean theorem in 2-D Whiteboard presentation Play

Application of the Pythagorean theorem in 2-D Class activity Play

Application of the Pythagorean theorem in 3-D Whiteboard presentation Play

Application of the Pythagorean theorem in 3-D Class activity Play

Application of X-rays Student activity Play

Approximate values of the cosine function Simulation Play

Arcs Whiteboard exercise Play

Arcs Student activity Play

Are two angles equal? Student activity Play

Are two angles equal? Whiteboard exercise Play

Are two polygons similar? Animation Play

Area under enlargement – a heptagon Whiteboard exercise Play

Areas of figures Student activity Play

Areas of images of figures under enlargement Student activity Play

Areas under enlargement Animation Play

Arithmetic mean – 'balancing point' of the data Whiteboard exercise Play

Arithmetic mean – 'balancing point' of the data Student activity Play