T H E
E L E M E N T S 
Book III
Proposition 10

Then, since
in the circle ABC a straight line AC cuts a straight line BH into two equal parts
and at right angles,
the center of the circle ABC is on AC. [III.1, Por.]
Again, since
in the same circle ABC a straight line NO cuts a straight line BG into equal parts
and at right angles,
the center of the circle ABC is on NO. [III.1, Por.]


Previous Page
Return to Propositions Next Page
