In how many ways can it happen? Student activity Play

Inscribed circles Whiteboard exercise Play

Inscribed circles, circumscribed polygons Student activity Play

Interesting fact Animation Play

Interesting information Animation Play

Is a practical demonstration reliable? Student activity Play

Isosceles triangles and symmetry Student activity Play

Isosceles triangles – solving problems Whiteboard exercise Play

Kinds of triangles – classification by angles Student activity Play

Kinds of triangles – classification by angles and sides Simulation Play

Kinds of triangles – classification by sides Student activity Play

Kinds of triangles – classification by sides Simulation Play

Length constructions Student activity Play

Length of a side of a cube Whiteboard exercise Play

Making a triangle Animation Play

Many different rectangles Student activity Play

Miscellaneous problems Student activity Play

Mixed problems Student activity Play

Note Animation Play

Number of all sections of a cube Whiteboard exercise Play

Number of diagonals of an  n-gon Whiteboard exercise Play

Paper sizes Student activity Play

Parallelograms and rectangles Student activity Play

Parallelograms and rectangles Simulation Play

Patterns and formulas – letter H Student activity Play