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Mathematical information of the center
Intersection point of three midlines of the triangle of center of gravity

Properties: The center of gravity divides each midline into a vertex part X and a bottom part Y, where x:y=2: 1.

The intersection of three bisectors of an inner triangle

Attribute: The distances to three sides are equal.

The intersection of three heights of a vertical triangle.

Properties: Four equilateral (circumscribed) circular triangles caused by the vertical center of the triangle.

The intersection of vertical lines on three sides of the epicenter triangle.

Attribute: The distances to the three vertices are equal.

The intersection of the two bisectors of the outer angle and the third bisector of the inner angle of a near-center triangle.

Usually outside the triangle

Attribute: The distances to three sides are equal.