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the two sides AC, CD are equal to the two sides BC, CD; and the angle ACD is equal to the angle BCD, for each is right;
therefore
the base AD is equal to the base DB. [I.4]
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T H E E L E M E N T S |
Book III Proposition 30 | |
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Then, since AC is equal to CB, and CD is common, the two sides AC, CD are equal to the two sides BC, CD; and the angle ACD is equal to the angle BCD, for each is right; therefore the base AD is equal to the base DB. [I.4] |
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