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the base BC will coincide with the base EF.
[For if, when B coincides with E and C with F, the base BC does not coincide with the base EF, two straight lines will enclose a space: which is impossible.]
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T H E E L E M E N T S |
Book I Proposition 4 | |
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Thus B coincides with E and C with F; hence the base BC will coincide with the base EF. [For if, when B coincides with E and C with F, the base BC does not coincide with the base EF, two straight lines will enclose a space: which is impossible.] |
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