Straight lines and half-planes Chart Play

Structure and properties of macromolecular crystals Animation Play

Structure and properties of molecular crystals Animation Play

Structure and properties of water Student activity Play

Symmetries with respect to a line and to a point Student activity Play

Symmetry and congruency Class activity Play

Symmetry and congruency Whiteboard presentation 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 a point Animation Play

Symmetry with respect to the origin Whiteboard exercise Play

Tangent to a circle Whiteboard exercise Play

Tangent to a circle Student activity Play

Tangent to a circle through a point not on the circle Student activity Play

Tangent to a circle through a point not on the circle Whiteboard exercise Play

Tangent to a parabola Student activity Play

Tangent to a parabola intersecting axis in the given point Whiteboard exercise Play

Tangent to the curve at the extremum point Simulation Play

Tangents Student activity Play

The ant's route Animation Play

The boiling point Student activity Play

The boiling point Simulation Play

The boiling point Whiteboard exercise Play

The boiling point of water and the pressure Student activity Play

The boiling point of water and the pressure Simulation Play