SOLUTION: How do I find the centre of a circle ? I done this in high school, but that was 25 years ago, and now I just can't remember it.

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Question 20390: How do I find the centre of a circle ? I done this in high school, but that was 25 years ago, and now I just can't remember it.
Found 2 solutions by AnlytcPhil, cleomenius:
Answer by AnlytcPhil(1116) About Me  (Show Source):
You can put this solution on YOUR website!
How do I find the centre of a circle ? I done this in high school, but that was 25 years ago, and now I just can't remember it.
Use two theorems:
1. The perpendicular bisector of a chord is a diameter.
2. The midpoint of a diameter is the center.
So, draw a chord. Draw its perpendicular bisector, which is a diameter. Then find its midpoint. This is the center.
Edwin
AnlytcPhil@aol.com

Answer by cleomenius(959) About Me  (Show Source):
You can put this solution on YOUR website!
The intersection of the perpendicular bisectors of any two nonparallel chords of a circle is the center of the circle.
Cleomenius