Sides of the triangles Animation Play

Sierpinski Gasket – activity Whiteboard exercise Play

Solving problems Student activity Play

Solving problems involving trigonometric ratios Class activity Play

Solving problems involving trigonometric ratios Whiteboard presentation Play

Solving problems using the tangent theorem Student activity Play

Solving problems using the tangent theorem Simulation Play

Solving triangles Student activity Play

Solving triangles Whiteboard exercise Play

Solving triangles Whiteboard exercise Play

Square circumscribed and inscribed in a circle Student activity Play

Square circumscribed and inscribed in a circle Whiteboard exercise Play

SSS property of similar triangles Whiteboard exercise Play

SSS property of similar triangles Student activity Play

Subdivision into triangles Simulation Play

Substituting into formulas connected with a right-angled triangle Student activity Play

Substituting into formulas connected with any triangle Student activity Play

Substituting into formulas connected with triangles Whiteboard exercise Play

Sum of angles in a triangle Animation Play

Sum of the angles in a quadrilateral – proof Animation Play

Sum of the angles in a triangle – proof Animation Play

Symmetrical figures Whiteboard exercise Play

Symmetrical triangles Animation Play

Symmetry and congruency Class activity Play

Symmetry and congruency Whiteboard presentation Play