Question

Two altitudes of a triangle meet at a point O. Without any other information, can the point of intersection of the third altitude with the other altitudes be determined? Answer in Yes/No.

Answer 1

Orthocentre is the point where all the altitudes of a triangle meet.

$\therefore$ All the altitudes will meet at a single point.
If any of the two altitude meet at a point O, then the third altitude must meet at the same point.

Hence, the required point is O.