Regular tetrahedron Whiteboard exercise Play

Regular tetrahedrons Student activity Play

Reliability of demonstration Animation Play

Representations Whiteboard presentation Play

Representations Class activity Play

Rhombuses Simulation Play

Rhombuses and squares Student activity Play

Riddles about 3-D shapes Student activity Play

Riddles about 3-D shapes Whiteboard exercise Play

Right-angled triangle or not? Animation Play

Roots of the quadratic equation – example Animation Play

SAS property of similar triangles Student activity Play

Sections of a cube Student activity Play

Shapes bounded by arcs and segments Whiteboard exercise Play

Shapes bounded by arcs and segments Student activity Play

Side-Angle-Side property (SAS) Whiteboard exercise Play

Sides of the trapezium Animation Play

Sides of the triangles Animation Play

Similar prisms Whiteboard exercise Play

Similar prisms and pyramids Student activity Play

Similar solids Student activity Play

Solids exhibition Animation Play

Solution of the equation ax 2 + bx + c = 0 Student activity Play

Solution of the equation ax 2 = b Student activity Play

Solving a quadratic equation Student activity Play