Parallel lines and corresponding angles Whiteboard exercise Play

Parallel lines and corresponding angles Student activity Play

Parallel lines – part I Student activity Play

Parallel lines – part II Student activity Play

Parallel straight lines Animation Play

Perpendicular lines Animation Play

Perpendicular lines Whiteboard exercise Play

Perpendicular lines Whiteboard exercise Play

Perpendicular lines Whiteboard exercise Play

Perpendicular lines Student activity Play

Perpendicular lines Student activity Play

Perpendicular straight lines Animation Play

Points equidistant from lines Animation Play

Points of intersection Student activity Play

Points of intersection Simulation Play

Points of intersection of a parabola and a straight line Student activity Play

Points of intersection of a parabola and a straight line Whiteboard exercise Play

Probability of the union of the events Animation Play

Problems involving properties of angles and parallel lines Whiteboard presentation Play

Problems involving properties of angles and parallel lines Class activity Play

Proportions in crossing lines cut by two parallel lines Student activity Play

Proportions in crossing lines cut by two parallel lines Whiteboard exercise Play

Reading out from the graph the  x- and  y-intercepts of a linear function Simulation Play

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

Reflection symmetry in the vertical and horizontal lines Whiteboard exercise Play