The point where the three "altitudes" of a triangle meet. An "altitude" is a line that goes through a vertex (corner point) and is at right angles to the opposite side.
Try moving the points below, and notice:
• the orthocenter can be inside or outside of the triangle.
• also try putting the points on grid lines and see what interesting things you can discover.
Try moving the points below, and notice:
• the orthocenter can be inside or outside of the triangle.
• also try putting the points on grid lines and see what interesting things you can discover.