T H E E L E M E N T S |
Book III Proposition 14 | |
And the square on AF is equal to the square on CG, for AF
is equal to CG; therefore the square on FE which remains is equal to the square on EG, therefore EF is equal to EG. But in a circle straight lines are said to be equally distant from the center when the perpendiculars drawn to them from the center are equal; [III.Def.4] therefore Being what it was required to prove. |
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