Reflection symmetry Animation Play

Reflection symmetry Whiteboard exercise Play

Reflection symmetry in the coordinate system in the line y = x 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 of a figure in the coordinate system Whiteboard exercise Play

Regression line Class activity Play

Regression line Whiteboard presentation Play

Regular polygons – the dodecagon Student activity Play

Regular polygons – the square Simulation Play

Regular polygons – the square Student activity Play

Relative abundance of isotopes and mass spectra Student activity Play

Roentgen spectra of elements – characteristic radiation Student activity Play

Ruler-and-compass constructions Class activity Play

Ruler-and-compass constructions Whiteboard presentation Play

Sample handling Animation Play

Satellite television Slideshow Play

Satellite television Student activity Play

Sense and line of direction of the velocity vector Animation Play

Set of points in a coordinate system Student activity Play

Set of points in a coordinate system Whiteboard exercise Play

Sides of a line Whiteboard exercise Play

Sides of a line Student activity Play

Sides of the triangles Animation Play

Similar functions – similar graphs Whiteboard exercise Play