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Inversion: A Most Useful Kind of Transformation.
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Dubrovsky, Vladimir – Quantum, 1992
The transformation assigning to every point its inverse with respect to a circle with given radius and center is called an inversion. Discusses inversion with respect to points, circles, angles, distances, space, and the parallel postulate. Exercises related to these topics are included. (MDH)
Descriptors: Enrichment Activities, Geometric Concepts, Geometric Constructions, High Schools