T H E E L E M E N T S |
Book VI Proposition 33 | |
But, as the angle BGC is to the angle EHF, so is the angle BAC, to the angle EDF; for they are doubles respectively. Therefore also, as the circumference BC is to the circumference EF, so is the angle BGC to the angle EHF, and the angle BAC to the angle EDF. |
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