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the angle ACE was proved equal to the angle CAB
and, also,
the angle ECD was proved equal to the angle ABC.
Therefore
the whole angle ACD is equal to the two interior and opposite angles CAB, ABC.
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T H E E L E M E N T S |
Book I Proposition 32 | |
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Now the angle ACE was proved equal to the angle CAB and, also, the angle ECD was proved equal to the angle ABC. Therefore the whole angle ACD is equal to the two interior and opposite angles CAB, ABC. |
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