Regular triangle and regular hexagon Whiteboard exercise Play

Relationships between voltage and current Animation Play

Resistance Student activity Play

Resistance Glossary Play

Resistors Whiteboard presentation Play

Resistors Class activity Play

Right-angled triangle Animation Play

Right-angled triangle or not? Animation Play

Roots and the index law for the power of a power Animation Play

Rotation Animation Play

Rotation is a transformation Student activity Play

Rotational symmetry Student activity Play

Rotational symmetry of order 4 Simulation Play

Rotational symmetry of order 6 Simulation Play

Ruler-and-compass constructions Whiteboard presentation Play

Ruler-and-compass constructions Class activity Play

Ruler-and-compass constructions, locus (2) Class activity Play

Ruler-and-compass constructions, locus (2) Whiteboard presentation Play

SAS property of similar triangles Student activity Play

SAS property of similar triangles Whiteboard exercise Play

Scale factor Student activity Play

Sectors and segments Whiteboard exercise Play

Sectors and segments Student activity Play

Shapes in a graphic calculator Simulation Play

Shapes in graphic calculators Student activity Play