T H E E L E M E N T S |
Book I Proposition 25 | |
Then, since the angle ABE is equal to the angle BAE the straight line EB is also equal to EA. [I.6] (continue) And, since AD is equal to DC, and DE is common, the two sides AD, DE are equal to the two sides CD, DE respectively; and the angle ADE is equal to the angle CDE, for each is right; therefore the base AE is equal to the base CE. |
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