Orthocenter
| CQ is perpendicular to AB ____________________ | By construction. See Perpendicular to a line from an external point with compass and straightedge for method and proof. ______________________________________________________________________ |
| CQ is an altitude of the triangle ABC ____________________ | An altitude of a triangle is a line segment through a vertex and perpendicular to the opposite side. ________________________________________________________________________ |
| BE is perpendicular to AC ___________________ | By construction. See Perpendicular to a line from an external point with compass and straightedge for method and proof. __________________________________________________________________________ |
| BE is an altitude of the triangle ABC ___________________ | An altitude of a triangle is a line segment through a vertex and perpendicular to the opposite side. ___________________________________________________________________________ |
| O is the orthocenter of the triangle ABC __________________ | The orthocenter of a triangle is the point where its altitudes intersect ___________________________________________________________________________ |
How do you create an orthocenter?