Match the vocabulary word with the correct definition 1. projection of a segment on a line the portion of a line with endpoints that are the projections of the endpoints of the segment 2. projection of a point on a line the point where a perpendicular through the point to the line intersects the line 3. altitude of a triangle For any positive real numbers a, b, and x, if then x is called the between a and b. Notice that or . 4. geometric mean in a triangle, the perpendicular line from a vertex to the opposite side