Regular polygons – the square Student activity Play

Regular polyhedron Animation Play

Regular shapes Student activity Play

Relationship between volumes of similar solids Student activity Play

Relationship between volumes of similar solids Whiteboard exercise Play

Reliability of demonstration Animation Play

Representing a quadratic function in vertex form by completing the square Student activity Play

Rhombuses and squares Student activity Play

Riddles about 3-D shapes Student activity Play

Riddles about 3-D shapes Whiteboard exercise Play

Roots of roots – finding true equations Whiteboard exercise Play

Roots of roots – more examples of true or false equations Whiteboard exercise Play

Rotation symmetry Animation Play

Rotations Whiteboard exercise Play

Rotations Student activity Play

'Rounded' Pythagorean theorem Animation Play

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

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

Rules of multiplication and irrational numbers Animation Play

Scale factor Student activity Play

Sections of a cube Whiteboard exercise Play

Sections of a cube Student activity Play

Shapes that have rotation symmetry Student activity Play

Sierpinski's Carpet Animation Play

Sierpinski's Carpet Whiteboard exercise Play