Sunto CA , CB semi-axes Hyperbolæ; PG , KD diametri conjugatæ; PF , Qt perpendicula ad diametros; & Qv ordinatim applicata ad diametrum GP . Agatur SP secans tum diametrum DK in E , tum ordinatim applicatam Qv in x , & compleatur parallelogrammum QRPx . Patet EP æqualem esse semi-axi transverso AC , eo quod, acta ab altero Hyperbolæ
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SECT. III.
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