1. The problem asks to identify the term that describes the line segment TR in the triangle with vertices Q, R, S, and T. 2. Given that TR is drawn from vertex T to vertex R, and there is a right angle marker at vertex R indicating that TR is perpendicular to QS. 3. Definitions: - An **angle bisector** divides an angle into two equal parts. - A **median** connects a vertex to the midpoint of the opposite side. - An **altitude** is a perpendicular segment from a vertex to the line containing the opposite side. - A **perpendicular bisector** is a line perpendicular to a segment at its midpoint. 4. Since TR is perpendicular to QS at R, and R is a vertex of the triangle, TR is an altitude from vertex T to side QS. 5. Therefore, the term that describes TR is **altitude**. Final answer: **altitude**