Polar Command
From GeoGebra Manual
- Polar( <Point>, <Conic> )
- Creates the polar line of the given point relative to the conic section.
- Example:
Polar((0,2), y = x^2 - 3x + 5)creates the line 1.5x + 0.5y = 4
Note: See also 
Polar or Diameter Line tool.
Polar or Diameter Line tool.
- Polar(<Line>, <Conic>)
- Creates the pole, given a polar line and a conic.
- Example:
Polar(1.5x+0.5y=4, y = x^2 - 3x + 5)creates the point (0, 2)
