Question

Select the construction that guaranties A is a reflection of point A across line BC

Answer 1

I think it's Axial Symmetry.

Explanation:

1. You draw a perpendicular line to the line BC through A.
2. You get your compass and set it to the distance between the point A and the line BC.
3. Using that distance on your compass, put the point of your compass on the point where the perpendicular line and BC intersect.
4. Mark the distance on the perpendicular line.
5. The reflection is the point you mark on the perpendicular line.