Point in the plane

### 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

A:=point(2,1)

or:

A:=point([2,1])

or:

A:=point(2+i)

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

A:=point(1,2*i)

or:

A:=point([1,2*i])

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