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We start with a triangle ABC.
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1. Find the bisector
of one of the triangle sides. Any one will do.
See Constructing the Perpendicular Bisector of a Line Segment for detailed instructions.
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| 2. Repeat for the another side. Any one will do. |
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| 3. Mark the point where these two perpendiculars intersect as point O.
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| (Optional step) Repeat for the third side.
This will convince you that the three bisectors do, in fact, intersect at a single point.
But two are enough to find that point. |
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Done The point O is the circumcenter of the triangle ABC.
Note: This point may be outside the triangle. This is normal.
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