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Subsections

- xAxis und yAxis

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Line

A line is entered as a linear equation in x and y or in parametric form. In both cases previously defined variables (numbers, points, vectors) can be used. The line's name has to be entered at the beginning of the input followed by a colon.

| equation | parametric form
line g | `g : 3x + 4y = 2` | `g : X = (-5, 5) + t (4, -3)`

Let be `k=2` and `d=-1` for example. Then we can define a line g by entering the equation `g : y = k x + d`.

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xAxis und yAxis

The two coordinate axes are available in commands using the names `xAxis` and `yAxis`. For example, the command `Perpendicular[A, xAxis]` constructs the perpendicular line to the x-axis through a point A.