O1R1T1H4O1C3E1N1T1E1R1S1
17 points
ORTHOCENTERS is validvalid
ORTHOCENTER, the intersection point of the altitudes of a triangle [n]
ORTHOCENTER, the point of intersection of the altitudes of a triangle, also ORTHOCENTRE [n]
ORTHOCENTER, the intersection point of the altitudes of a triangle [n]
ORTHOCENTER, the point of intersection of the altitudes of a triangle, also ORTHOCENTRE [n]