An elementary treatise on modern pure geometry (1893)
Lachlan, Robert · London, New York, Macmillan and Co. · leaf 287
are equicross. o fr ,i» v^- . ^^ ( ^N / ^^ 1 NV / ^_Ji—C^Z^^ ^ B\ \^, / I ^ ^ ( \ ^ ^ ; \ AT Bt C\ -D … Hence, if the rays of a pencil be cut by two transversals in thepoints A, A; B, B; C, C; D, D; the ranges {AB, CD}, {AB, CD}are equicross. It is also evident that, if {ABGD} be any range, and if P and Qbe any two points, the pencils,P{.4fi, CD}, P {AB, CD} are equi-cross. 424 Let {AB, CD}, {AB, CD}…
Geometry
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