A line parallel to a given line Whiteboard exercise Play

A line parallel to a given line Student activity Play

A perpendicular through a point off the line Student activity Play

A perpendicular through a point off the line Simulation Play

A perpendicular through a point on the line Simulation Play

A perpendicular through a point on the line Student activity Play

Angle bisector Student activity Play

Angle bisector Animation Play

Centroid of a triangle Animation Play

Circumcircle of a triangle Animation Play

Construction of a parallel line Animation Play

Construction of a parallelogram Simulation Play

Construction of a perpendicular line Simulation Play

Construction of a right-angled triangle Simulation Play

Construction of a tangent to the circle Simulation Play

Construction of an angle of 45 degrees Simulation Play

Construction of an isosceles right-angled triangle Simulation Play

Construction of bisectors Simulation Play

Correctness of the construction of a bisector Animation Play

Finding the centre of the incircle of the triangle Simulation Play

More constructions Student activity Play

Ruler-and-compass constructions, locus (1) Interactive lesson Play

Ruler-and-compass constructions, locus (1) Whiteboard presentation Play

The correctness of a construction Student activity Play

The correctness of a construction Animation Play

The perpendicular bisector Simulation Play

The perpendicular bisector Student activity Play

Using a ruler and a compass Animation Play

What can we do with a ruler and a compass? Student activity Play

What can we do with a ruler and a compass? Simulation Play