Me, !
identify line segment ab as an altitude, median, perpendicular bisector or angle bisector.

i would say perpendicular bisector but there is no 90 degree mark.
i know it isn't an angle bisector of altitude.

Median.

Step-by-step explanation:

We have been given a triangle. We are asked to find the exact name of line segment AB.

We can see that line segment AB divides opposite side of vertex A into equal parts.

We know that median of triangle is a line segment from any vertex of triangle that divides opposite side into two equal parts, therefore, line segment AB is median for the given triangle.

21.4 i did it already for s1

step-by-step explanation: