Final answer:
No, the student is not correct. To locate the orthocenter of a triangle, you need three altitudes since the orthocenter is the point where all three altitudes intersect.
Step-by-step explanation:
No, Kelly is not correct. The orthocenter of a triangle is the point of intersection of the altitudes of the triangle. An altitude is a line segment drawn from a vertex of the triangle perpendicular to the opposite side. In order to locate the orthocenter, you need three altitudes since the orthocenter is the point where all three altitudes intersect.