Property: the distance from the center of gravity to the vertex of the triangle is equal to twice the distance from the midpoint of the opposite side.
Vertical center: the intersection of three high lines of a triangle.
Attribute: There are four * * * cycles.
Exterior center: the intersection of three perpendicular bisector of a triangle.
Property: It is equidistant from each vertex of the triangle.
Inner heart: the intersection of three bisectors of a triangle.
Property: It is equidistant from the three sides of a triangle.