The area of a segment Student activity Play

The area of a segment of a circle Student activity Play

The area of a segment of a circle Whiteboard exercise Play

The biggest possible area Animation Play

The bisector of a line Whiteboard exercise Play

The bisector of a line Student activity Play

The bisector of a line Whiteboard exercise Play

The camera Student activity Play

The camera Whiteboard exercise Play

The centre and the radius Animation Play

The centre and the radius of a circle Student activity Play

The circle Class activity Play

The circle Whiteboard presentation Play

The circle as a locus Animation Play

The circumcentre of a triangle Whiteboard exercise Play

The circumcentre of a triangle Student activity Play

The coordinates of the marked points Whiteboard exercise Play

The coordinates of the vertex of a parabola Animation Play

The correlation coefficient Animation Play

The correlation coefficient Student activity Play

The diameter of the tree Animation Play

The distance between points A and B Animation Play

The distance between the images Animation Play

The distance between two points in the plane Student activity Play

The distribution of the rational numbers over the number line Animation Play