Question

8. Given point A is not on line m,suppose A is reflected across line m.Which of the following is true?A AA' is the bisector of line m.® Line m is the perpendicularbisector of AA'.C Line m is parallel to AA'.D A=A

Answer 1

Since we are reflecting the point across the line m, and assuming the line is a proper line (this means that it goes on in both of its sides) then the segment AA' will be the perpendicular bisector of the line.

A situation of this is shown below:

in this graph we have the reflection of a point across the line, and when we do this we end up with a segment that cuts the line in half and that it it perpendicular to the original line.

Therefore the answer is B.