It is the perpendicular bisector
A median of a triangle is a line or segment that passes through a vertex and the midpoint of the side opposite that vertex. The median only bisects the vertex angle from which it is drawn when it is an isosceles triangle.
A bisector is a line (or line segment) which passes through the midpoint. You can have multiple lines intersect at this one point, and all of them will bisect the original line segment, since they pass through its midpoint. A perpendicular bisector passes through the midpoint, and also is perpendicular to the original line segment, so there will be only one of those.
Theorem: The line segment connecting the midpoints of two sides of a triangle is parallel to the third side and is congruent to one half of the third side. Proof: Consider the triangle ABC with the midpoint of AB labelled M. Now construct a line through M parallel to BC.
There is no name for it except "A line perpendicular to a line segment and passing through its midpoint".
A segment bisector is a line, ray, or segment that divides a segment into two equal parts. Examples include the perpendicular bisector of a line segment, which intersects the segment at its midpoint at a right angle, and a midpoint connector that connects the midpoints of two segments. Additionally, any line that passes through the midpoint of a segment and extends in both directions can also be considered a segment bisector.
A median of a triangle is a line or segment that passes through a vertex and the midpoint of the side opposite that vertex. The median only bisects the vertex angle from which it is drawn when it is an isosceles triangle.
segment bisector
A segment bisector
A bisector is a line (or line segment) which passes through the midpoint. You can have multiple lines intersect at this one point, and all of them will bisect the original line segment, since they pass through its midpoint. A perpendicular bisector passes through the midpoint, and also is perpendicular to the original line segment, so there will be only one of those.
Theorem: The line segment connecting the midpoints of two sides of a triangle is parallel to the third side and is congruent to one half of the third side. Proof: Consider the triangle ABC with the midpoint of AB labelled M. Now construct a line through M parallel to BC.
A median of a triangle is a line segment joining a vertex to the midpoint of the opposite side. Altitude of a triangle is a straight line through a vertex and perpendicular to the opposite side or an extension of the opposite side.
There is no name for it except "A line perpendicular to a line segment and passing through its midpoint".
A segment bisector is a line, ray, or segment that divides a segment into two equal parts. Examples include the perpendicular bisector of a line segment, which intersects the segment at its midpoint at a right angle, and a midpoint connector that connects the midpoints of two segments. Additionally, any line that passes through the midpoint of a segment and extends in both directions can also be considered a segment bisector.
A line that is perpendicular to the segment of a plane and passes through the midpoint.
If you perform an angle bisector on an angle in a triangle, then it will go through the midpoint of the opposite side.
a line that intersects an edge of a triangle that is perpendicular to it and passes through the midpoint
If you fold the line segment in half so that the two ends are touching and then crease the paper, the crease will go right through the midpoint of the line segment.