It's called a perpendicular bisector of the line segment.
Perpendicular line segments are line segments that cross with each other and form angles of 90 degrees.
Perpendicular lines or line segments intersect to form a right or 90 degree angle.
no, not here you can only type on here but they're two lines that cross you can ask somebody around you
Set a compass to draw a circle with a radius that's more than half the length of the line segment but less than the whole length. Put the compass point at one end of the segment and draw an arc above...