## Euclid in Paragraphs: The Elements of Euclid: Containing the First Six Books and the First Twenty-one Propositions of the Eleventh Book ... |

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ABCD angle ABC angle ACB angle BAC base base BC BC is equal bisected centre circle circle ABC circumference common compounded Constr contained demonstrated describe diameter divided double draw drawn equal angles equal to F equiangular equilateral equimultiples extremity fall fore four fourth given straight line greater half join less Let ABC likewise magnitudes manner meet multiple parallel parallelogram pass perpendicular plane produced proportionals Q. E. D. PROPOSITION ratio reason rectangle rectangle contained rectilineal figure remaining angle right angles segment shown sides similar square square of AC straight line AC Take taken THEOR.-If third touches the circle triangle ABC wherefore whole