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Calling Sequence
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CrossRatio(A, B, C, F)
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Parameters
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Description
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Given four points A, B, C, F, the routine CrossRatio(A, B, C, F) computes the cross ratio of A, B, C, F taken in this order.
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If A, B, C, F are four distinct points on an ordinary line, the cross ratio of A, B, C, F taken in this order is defined as:
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The command with(geometry,CrossRatio) allows the use of the abbreviated form of this command.
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Examples
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