The midpoint of a segment Animation Play

The normal Whiteboard presentation Play

The normal Class activity Play

The notion of a half-plane Whiteboard exercise Play

The notion of a half-plane Student activity Play

The number line Whiteboard exercise Play

The number of car accidents Animation Play

The origin of spectral lines Animation Play

The perpendicular bisector Student activity Play

The perpendicular bisector Simulation 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 position of point B Whiteboard exercise Play

The position vector of the midpoint of the segment Animation Play

The price of a ball-pen Whiteboard exercise Play

The price of petrol Whiteboard exercise Play

The ratio of two segments Whiteboard exercise Play

The red line Whiteboard exercise Play

The rhombus and the circle Student activity Play

The rhombus and the circle Whiteboard exercise Play

The scalar product (1) Whiteboard presentation Play

The second tangent theorem Animation Play

The second tangent theorem – equality in length Student activity Play

The second tangent theorem – equality in length Whiteboard exercise Play