Vertical center: the intersection of three heights of a triangle.

Center: the point where the center of gravity, vertical center, outer center and inner center of a regular triangle coincide.

Epicenter: the intersection of the perpendicular lines of the three sides of a triangle, that is, the center of the circumscribed circle.

Inner heart: the intersection of the bisectors of the three inner angles of a triangle, that is, the center of the inscribed circle.