Parallel Lines

graph showing parallel lines

Parallel lines have the same slope.

Mathematically, we say if one line has slope m1 and another line has slope m2 then the lines are parallel if

m1 = m2

Interactive Graph

You can explore the concept of parallel lines in the following JSXGraph (it's not a fixed image).

Drag either point `A` or point `B` to explore slopes of parallel lines.

You can move the graph up-down, left-right if you hold down the "Shift" key and then drag the graph.

If you get lost, you can always refresh the page.