Geometry

Question Analysis

This question focuses on identifying the type of line segment  in the triangle, based on knowledge of angle bisectors, mid - segments, and perpendicular bisectors.

Key Concept Explanation

Angle bisector: A line segment that divides an angle of a triangle into two equal - measure angles.

Mid - segment: A line segment that connects the midpoints of two sides of a triangle.

Perpendicular bisector: A line that is perpendicular to a side of a triangle and bisects that side.

Step - by - Step Solution

1. Observe the angles in the triangle. We see that .

2. Recall the definition of an angle bisector. Since  divides  into two equal - measure angles, it meets the criteria of an angle bisector.

Option Analysis

Angle bisector: Correct. As

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