| 单词 | pedal coordinates | 
| 释义 | pedal coordinates [`ped·ǝl kō`ȯrd·ǝn·ǝts]  MATHEMATICS The coordinates r  and p describing a point P on a plane curve C, where r  is the distance from a fixed point O to P, and p is the perpendicular distance from O to the tangent to C at P.  | 
	
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