The area of a parallelogram Student activity Play

The area of a parallelogram Animation Play

The area of a parallelogram Whiteboard exercise Play

The area of a regular hexagon Whiteboard exercise Play

The area of a square Animation Play

The area of a trapezium Animation Play

The area of a trapezium Student activity Play

The area of a triangle Animation Play

The area of a triangle Student activity Play

The area of a triangle Student activity Play

The area of an equilateral triangle Student activity Play

The area of the rectangle Whiteboard exercise Play

The area of the rhombus Whiteboard exercise Play

The camera Student activity Play

The camera Whiteboard exercise Play

The circle and the equilateral triangle Whiteboard exercise Play

The circle and the equilateral triangle Student activity Play

The circle inscribed in a square Whiteboard exercise Play

The circle's circumference and its diameter Student activity Play

The counterexample Whiteboard exercise Play

The cube root Animation Play

The defects of lenses Student activity Play

The diagonal of a square Whiteboard exercise Play

The diagonal of a square Student activity Play

The diameter of the Earth Whiteboard exercise Play