Detecting outliers Student activity Play

Diagonals and sides of polygons Whiteboard exercise Play

Diagonals of polygons Student activity Play

Distance formula in 3-dimensional space Student activity Play

Distance – a more difficult problem Student activity Play

Distance – a more difficult problem Whiteboard exercise Play

Dividing an n-sided polygon into triangles Animation Play

Dividing into a given ratio Student activity Play

Dividing natural numbers Student activity Play

Dividing the polygon into triangles Whiteboard exercise Play

Divisibility by 11 Student activity Play

Division algorithm Student activity Play

Drawing a parallelogram Whiteboard exercise Play

Drawing a parallelogram and calculating its area Whiteboard exercise Play

Effectiveness Whiteboard exercise Play

Enlargement – the basic property Student activity Play

Enlarging the right-angled triangle – the basic property Simulation Play

Enlarging the square – the basic property Simulation Play

Equal angles imply parallel lines Student activity Play

Equally likely outcomes Student activity Play

Equations and tables Student activity Play

Estimation of the volume Animation Play

Exterior angle of a triangle – exercises Student activity Play

Exterior angles in quadrilaterals Student activity Play

Exterior angles of a triangle Student activity Play