Final answer:
The term 'transversal' is not part of a triangle; it describes a line that crosses other lines and is not a feature of a triangle. A triangle does consist of legs, an altitude, and, in the case of right triangles, a hypotenuse.
Step-by-step explanation:
The term that is not part of a triangle is a transversal. In geometrical terms, a transversal is a line that passes across two or more other lines in the same plane. It is often used to describe a line that crosses parallel lines, creating corresponding or alternate angles. A triangle is defined as a three-sided polygon consisting of three edges (or sides), three vertices, and three angles that add up to 180 degrees. The terms legs, altitude, and hypotenuse are indeed associated with triangles, especially right triangles. The legs refer to the two shorter sides of a right triangle that form the right angle, the altitude is the perpendicular line segment from a vertex to the line containing the opposite side, and the hypotenuse is the longest side of a right triangle, opposite the right angle, as shown by the Pythagorean theorem (a² + b² = c²).