Center of gravity: The three midlines of a triangle intersect at a point, and the distance from the point to the vertex is twice as long as the distance from the midpoint of the opposite side. This point is called the center of gravity of the triangle.

Exterior Center: The perpendicular bisector of three sides of a triangle intersect at one point. This point is called the outer center of the triangle.

Vertical center: The three heights of a triangle intersect at a point. This point is called the center of the triangle.

Heart-shaped: The bisectors of the three internal angles of a triangle intersect at one point. This point is called the heart of a triangle.

Paracenter: The bisector of the inner angle of a triangle intersects with the bisector of the outer angle of the other two vertices at a point. This point is called the center of the triangle. A triangle has three side centers.