The period of the tangent Student activity 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 points on a straight line Animation Play

The polygon made of two triangles Whiteboard exercise Play

The possible measures of the other angles Whiteboard exercise Play

The refractive index Whiteboard exercise Play

The refractive index Student activity Play

The relationship between acceleration and force Student activity Play

The relationship between acceleration and force Simulation Play

The relationship between change in the direction of movement and force Student activity Play

The road from a car park to a pier Whiteboard exercise Play

The scalar product (2) Class activity Play

The second tangent theorem Animation Play

The second tangent theorem – equality in length Student activity Play

The set of commands Whiteboard exercise Play

The shape designed by Lena Whiteboard exercise Play

The sides of isosceles triangles Student activity Play

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

The signs of the trigonometric functions Student activity Play

The signs of trigonometric functions – clockwise turn Whiteboard exercise Play

The sine of an arbitrary angle Student activity Play

The sine of an arbitrary angle Whiteboard exercise Play

The sine rule (the law of sines) Student activity Play