Rectangular board Whiteboard exercise Play

Reflecting telescopes Animation Play

Reflecting telescopes Student activity Play

Reflection is a transformation Student activity Play

Reflection symmetry in the coordinate system in the line y = –x Student activity Play

Reflection symmetry in the coordinate system in the lines x = a and y = b Student activity Play

Reflection symmetry in the coordinate system in the x-axis and the y-axis Student activity Play

Reflection symmetry of the triangle – the coordinates of the vertices Whiteboard exercise Play

Regular pentagon Animation Play

Regular polygons Animation Play

Regular polygons – the equilateral triangle Student activity Play

Regular polygons – the equilateral triangle Simulation Play

Regular polygons – the octagon Student activity Play

Regular tetrahedrons Student activity Play

Regular triangle and regular hexagon Whiteboard exercise Play

Relationship between the force of friction and the surface area Animation Play

Reliability of demonstration Animation Play

Renovation Whiteboard exercise Play

Representing a quadratic function in vertex form using the discriminant Student activity Play

Right-angled triangle Animation Play

Right-angled triangle or not? Animation Play

Roots of the quadratic equation – example Animation Play

Roots of the quadratic equation – example Animation Play

Rotation Animation Play

Rotation is a transformation Student activity Play