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Caption=To construct a circle circumscribed about a given triangle~~it is necessary to construct two its side bisectors.~~The center of the circumscribed circle lies at the~~intersection point of these side bisectors.~~~~Construction algorithm:~~1. Construct the midpoints of any two sides of the triangle.~~2. Construct two lines perpendicular to these sides and passing~~through their midpoints.~~3. Construct an intersection point of these lines.~~4. Construct a circle with center in the intersection point~~and passing through of of the triangle vertices.
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