Ruler-and-compass constructions Class activity Play

Sectors and segments Student activity Play

Similarity Animation Play

Solar System Animation Play

Solution of the equation ax 2 = b Student activity Play

Solving exercises using the normal to a circle Student activity Play

Solving problems involving circles Whiteboard presentation Play

Solving problems involving circles Class activity Play

Solving problems using the tangent theorem Simulation Play

Space flights Student activity Play

Space flights Simulation Play

Space flights Whiteboard exercise Play

Square circumscribed and inscribed in a circle Whiteboard exercise Play

Square circumscribed and inscribed in a circle Student activity Play

Surface of a cone Student activity Play

Symmetry in a circle Simulation Play

Symmetry in a circle Student activity Play

Tangent to a circle Student activity Play

Tangent to a circle Whiteboard exercise Play

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

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

Tangent to an arbitrary curve Animation Play

Tangents Student activity Play

Tangents to a circle Student activity Play

Tangents to a circle Whiteboard exercise Play