Assertion: polar coordinate system | /r/HasProperty | constructed in the plane
Facets:
value: by choosing a point
type: MANNER
Source sentences:
text: A polar coordinate system is constructed in the plane by choosing a point O called the pole and through it a directed straight line, the initial line.
text: A polar coordinate system is constructed in the plane by choosing a point O called the pole and through it a directed straight line, the initial line.