Biangular coordinates
Encyclopedia
In mathematics
, biangular coordinates are a coordinate system
for the plane
where
and 
are two fixed points, and the position of a point P not on the line 
is determined by the angles 
and 
.
Mathematics
Mathematics is the study of quantity, space, structure, and change. Mathematicians seek out patterns and formulate new conjectures. Mathematicians resolve the truth or falsity of conjectures by mathematical proofs, which are arguments sufficient to convince other mathematicians of their validity...
, biangular coordinates are a coordinate system
Coordinate system
In geometry, a coordinate system is a system which uses one or more numbers, or coordinates, to uniquely determine the position of a point or other geometric element. The order of the coordinates is significant and they are sometimes identified by their position in an ordered tuple and sometimes by...
for the plane
Plane (mathematics)
In mathematics, a plane is a flat, two-dimensional surface. A plane is the two dimensional analogue of a point , a line and a space...
where
and are two fixed points, and the position of a point P not on the line is determined by the angles and .