The missing angle in a triangle Whiteboard exercise Play

The missing angles in special triangles Whiteboard exercise Play

The moon-shaped figures Animation Play

The numbers in Pascal's Triangle Whiteboard exercise Play

The pattern for variables in binomial expansions Student activity Play

The perimeter of the triangle and the diameter of the big circle Animation Play

The perimeters of the triangles – trigonometric ratios for selected angles Whiteboard exercise Play

The perimeters of the triangles – trigonometric ratios for selected angles Whiteboard exercise Play

The perpendicular bisector Student activity Play

The perpendicular bisector Whiteboard exercise Play

The perpendicular bisector in a circle Animation Play

The perpendicular bisector of a line segment Animation Play

The perpendicular bisector of a line segment – a reminder Student activity Play

The polygon made of two triangles Whiteboard exercise Play

The prism Whiteboard exercise Play

The prism Student activity 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