• coordinate ⪢⪢
http://qindex.info/i.php?x=11999

• coordinate ⪢⪢
http://qindex.info/i.php?x=18873

• 09 Graphing On The Coordinate Plane
http://qindex.info/i.php?x=5075

• 18 Graphing in Algebra: Ordered Pairs and the Coordinate Plane
Graphing in Algebra: Ordered Pairs and the Coordinate Plane
http://qindex.info/i.php?x=5086

• Polar Coordinates and Graphing Polar Equations
http://qindex.info/i.php?x=3696

○○○ gauge ⪢⪢
But for now you can just think of a gauge as meaning a choice of coordinate system.
http://qindex.info/i.php?x=20854

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