| 释义 |
inverse points Given a circle with centre O and radius r, two points A and B are inverse points if O, A, and B are collinear and |OA||OB| = r2. Inversion—the map taking a point to its inverse point—has various theories associated with it; for example, inversion preserves angles (though it reverses the sense of the angle) and also maps a circle or line not through O to a circle.
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