You can understand the concept of reflection by imagining a lake. Suppose a mountain is reflected on the lake across an imaginary horizontal line in the ground. This line is the** Line of Symmetry. **So, in this problem we need to solve four items. Therefore:

**1. Reflection line is perpendicular to AB**

This is **true. **To reflect Point B onto Point A, we need to take a Line of Symmetry perpendicular to the segment AB as illustrated in Figure 1. This line is the one in red and the blue square indicates that the red line and the segment AB are perpendicular.

**2. Reflection line does not bisect AB**

This is **false**. Instead, the line in red bisect the segment AB, that is, it divides the segment into two equal parts as indicated in Figure 2. The **x **in blue represents the point at which the red line bisects the segment.

**3. Reflection line passes through the midpoint of BA.**

This is **true. **Given that the red line divide the segment into two equal parts, then the point at which the red line bisects the segment is also called the* midpoint (M) *as indicated in Figure 3.

**4. Reflection line forms two equal angles with segment AB.**

This is **true. **As you can see in Figure 4, the two blue angles are equal and the two green angles are equal. So, reflection line forms two equal angles with segment AB. In fact, each of these angles measures 90 degrees. Accordingly, all these four angles are equal.