Sum of angles in quadrilaterals Student activity Play

Sum of the angles in a quadrilateral Simulation Play

Symmetric figures Whiteboard exercise Play

Symmetry in the coordinate system with respect to the point (0, 0) Whiteboard exercise Play

Symmetry in the coordinate system with respect to the point (0, 0) Student activity Play

Symmetry with respect to the origin Whiteboard exercise Play

The angles of a quadrilateral Student activity Play

The angles of a quadrilateral Animation Play

The angles of a triangle Animation Play

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

The content of a problem as an algebraic expression Animation Play

The distance formula – applications Student activity Play

The game of Change Places Animation Play

The perpendicular bisector Student activity Play

The sum of the exterior angles Student activity Play

The two sides and an angle between them Whiteboard exercise Play

Theorems and their assumptions in geometry Student activity Play

Translation by the vector Whiteboard exercise Play

Translation in the coordinate system Student activity Play

Triangle Animation Play

Triangles Student activity Play

Triangles – part I Student activity Play

Triangles – reminder Animation Play

Trigonometric ratios in a right-angled triangle Student activity Play

Vertices of the triangle Whiteboard exercise Play