Figures symmetrical with respect to a point Student activity Play

Figures symmetrical with respect to a point Whiteboard exercise Play

Forming a square from triangles Animation Play

Graph of a quadratic function Animation Play

Graphs of functions similar to the reciprocal function Student activity Play

How to check directly whether two triangles are congruent Student activity Play

How to check directly whether two triangles are congruent Whiteboard exercise Play

How to draw a triangle symmetrical to a given point Animation Play

Isosceles triangles Whiteboard exercise Play

Isosceles triangles Whiteboard exercise Play

Isosceles triangles and symmetry Whiteboard exercise Play

Isosceles triangles and symmetry Student activity Play

Isosceles triangles – solving problems Whiteboard exercise Play

Isosceles triangles – solving problems Student activity Play

Isosceles triangles – solving problems Whiteboard exercise Play

Kinds of triangles – classification by angles Simulation 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

Lena's way Animation Play

Property of enlargement – the triangles Whiteboard exercise Play

Recognition of congruent triangles Animation Play

Reflection symmetry Whiteboard exercise Play

Reflection symmetry Animation Play