Telescope in the cuboid box Animation Play

The area and the height of the rhombus Whiteboard exercise Play

The area of a circle Student activity Play

The area of the rhombus Whiteboard exercise Play

The beginning of the magic square Animation Play

The circle and the equilateral triangle Student activity Play

The content of a problem as an algebraic expression Animation Play

The content of a problem as an algebraic expression Student activity Play

The diagonal of a square Whiteboard exercise Play

The diagonal of a square Student activity Play

The formula for the space diagonal of a cube Whiteboard exercise Play

The formula for the space diagonal of a cube Student activity Play

The height of a pyramid Animation Play

The medieval octagon Animation Play

The method of finding the sum of vectors Animation Play

The parallelogram rule Student activity Play

The prism Student activity Play

The rectangle Student activity Play

The rhombus Student activity Play

The space diagonal of a cube Animation Play

The space diagonals of a cube Whiteboard exercise Play

The space diagonals of a cube Student activity Play

The square inscribed in a circle Whiteboard exercise Play

The sum of the interior angles of a quadrilateral – proof Animation Play

Theorems and their assumptions in geometry Student activity Play