the idea of intersection regarding the three altitudes of a triangle.

: the intersection regarding the three outlines which can be attracted moving from three sides of a triangle to a point over the contrary part in which each line intersects that side at a 90 degree angle; in an acute triangle, it's in the triangle; in an obtuse triangle, its outside the triangle.

That point when the three perpendiculars allow fall from the angles of a triangle upon the opposite sides, and/or edges produced, mutually intersect.

The cointersection point of this straight outlines through the three vertexes of a triangle perpendicular to your other edges.

## How would you define orthocenter?