Smart, Edward Howard · London : Macmillian and Co. · leaf 79
Fig. 22a. § 13. (a) Inverse Similarity. Two similar figures need not possess the property of directsimilarity. For (Fig. 23) keeping one of them X in its … Pio. 23. 52 PROJECTIVE GEOMETRY original position, we could construct the image of the other Xin any straight line passing through the homothetic centre.Calling this image X we could not, by any rotation in theirown plane, bring X and X into coincidence.X and X are then called inversely similar.…
Geometry, Projective
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