The prism Whiteboard exercise Play

The Professor's garden Animation Play

The Pythagorean theorem Student activity Play

The Pythagorean theorem in real life Student activity Play

The radius of the circle inscribed into the right triangle Whiteboard exercise Play

The ratio 1 : 2 Whiteboard exercise Play

The ratio of perimeters Whiteboard exercise Play

The ratio of squares to triangles Whiteboard exercise Play

The ratio of two values Animation Play

The ratio of two values Student activity Play

The ratios of more than two quantities Student activity Play

The rectangle Student activity Play

The rectangle Whiteboard exercise Play

The red line Whiteboard exercise Play

The relationship between drag and the cross-sectional area of a body Simulation Play

The relationship between drag and the cross-sectional area of a body Student activity Play

The relationship between drag and the cross-sectional area of a body Whiteboard exercise Play

The rhombus Student activity Play

The rhombus and the circle Whiteboard exercise Play

The rhombus and the circle Student activity Play

The right prism based on a right-angled triangle Whiteboard exercise Play

The right triangle Animation Play

The roots of a quadratic equation Animation Play

The running truck Whiteboard exercise Play

The same force – different effects Animation Play