Ratios in paper sizes Animation Play

Ratios of sides in a triangle Animation Play

Ratios of squares Animation Play

Reactions in the gaseous phase Student activity Play

Rectangular right prism Animation Play

Regular tetrahedrons Student activity Play

Relationship between volumes of similar solids Student activity Play

School history competition Whiteboard exercise Play

School maths competition Whiteboard exercise Play

Segment divided into 36 equal parts Whiteboard exercise Play

Shadow Whiteboard exercise Play

Shadow Student activity Play

Similar prisms and pyramids Student activity Play

Similar pyramids Whiteboard exercise Play

Similar solids and their volumes Student activity Play

Slope of a line Student activity Play

Solids considered by Archimedes Whiteboard exercise Play

Solution of the equation ax 2 = b Student activity Play

Solving a quadratic equation Student activity Play

Solving equations in the form of a proportion Whiteboard exercise Play

Solving equations in the form of a proportion Student activity Play

Solving problems involving trigonometric ratios Whiteboard presentation Play

Solving problems involving trigonometric ratios Class activity Play

Solving triangles Whiteboard exercise Play

Solving triangles Student activity Play