26.5.2  Point in the plane

See Section 27.3.1 for points in space.

In the 2D geometry screen in point mode, clicking on a point with the left mouse button will choose that point. Points chosen this way are automatically named, first with A, then B, etc.

Alternatively, the point command chooses a point.

• point takes one or two arguments: coords, where coords can be one of:
  • a,b, a sequence of two coordinates.
  • [a,b], a list of two coordinates.
  • a+b i, the affix of the point.
• point(coords) returns and draws the point with the given coordinates.

Example

or:

or:

The marker used to indicate the point can be changed; see Section 26.3.2.

If the point command has two numbers for arguments, at least one of which is complex but not real, then it will choose two points.

Example

or:

There are two points named A; one with affix 1 and one with affix 2i.