CrossRatio Command

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CrossRatio

This article is about GeoGebra command.

Command Categories (All commands)


CrossRatio( <Point A>, <Point B>, <Point C>, <Point D> )
Calculates the cross ratio λ of four collinear points A, B, C and D, where:
λ = AffineRatio[B, C, D] / AffineRatio[A, C, D].
Example:
CrossRatio[(-1, 1), (1, 1), (3, 1), (4, 1)] yields 1.2
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