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Invariance of the cross ratio
Yazar:
F_Futamura
Konu:
Geometri
,
Geometrik Dönüşümler
A, B, C and D are four equally spaced points along a line. Their cross ratio is -1/3, as shown below. Move any of the blue points, O, A' or D' to verify that the cross ratio is invariant under projection.
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