The intersection of three heights of a triangle is called the vertical center of the triangle.

The vertical center of an acute triangle is inside the triangle.

The vertical center of a right triangle is at the right vertex of the triangle.

The vertical center of an obtuse triangle is outside the triangle.

The vertical center is the intersection of three vertical lines from each vertex of a triangle to its opposite side.

Three vertices, three vertical feet and seven vertical centers of a triangle can get six four-point circles.