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T H E E L E M E N T S |
Book III Proposition 31 | |
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Let AE be joined, and let BA be carried through to F. (continue) Then, since BE is equal to EA, the angle ABE is also equal to the angle BAE, [I.5] Again, since CE is equal to EA, the angle ACE is also equal to the angle CAE. [I.5] |
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