Construct a midpoint or perpendicular bisector a line segment

Mark a midpoint of AB
Draw a line or ray or line segment CD and mark a midpoint of AB
Draw a circle A is the same radius with circle B.
Draw the circle A and B which has radius AB.
Construct perpendicular bisector of AB.
Construct a midpoint of MN.
– Kru Kaew

Information: Construct a midpoint or perpendicular bisector a line segment