A chord and a diameter of a circle Student activity Play

A chord and a diameter of a circle Whiteboard exercise Play

A cyclic quadrilateral Student activity Play

A diagonal of a cuboid Animation Play

A golden section Animation Play

A segment and a position vector of its midpoint Simulation Play

A segment square root of 2 units long and others Animation Play

A staircase Student activity Play

A staircase Animation Play

A symmetrical triangle on squared paper Student activity Play

Angles in a cyclic quadrilateral Student activity Play

Annelids Student activity Play

Applying the Pythagorean theorem Animation Play

Are you good at estimating lengths? Student activity Play

Areas of figures Student activity Play

Building a square from two squares Animation Play

Building the polygon with the biggest possible area Whiteboard exercise Play

Central and inscribed angles on the same arc Student activity Play

Central symmetry Animation Play

Changing metric units Animation Play

Chords and diameters Student activity Play

Circle theorems Class activity Play

Circle theorems Whiteboard presentation Play

Common polygons Student activity Play

Constructing a perpendicular bisector Simulation Play