Question

What is a perpendicular bisector?

Answer 1

A perpendicular bisector usually means a line which 'cuts' a segment in half exactly, and is perpendicular to it. I say segment and not line, because a line extends to infinite in both directions and there is no concept of cutting something of infinite length in half.
You can bisect other things like angles using lines.

Answer 2

Thanks, that helped a lot !

Answer 3

Also, the gradient f a segment is the same as the gradient of a line which is parallel to it call this line \[l_1.\] Your perpendicular bisector which we are going to call \[l_2\] must be perpendicular to \[l_1\] and so it will be perpendicular to the segment that you want to bisect.

Answer 4

Thanks again, just trying to study before I take this Geometry quiz!