Question

Rule of perpendicular and perpendicular bisector. ​

Answer 1

Definition: A line which cuts a line segment into two equal parts at 90°. Try this Drag one of the orange dots at A or B and note the the line AB always divides the segment PQ into two equal parts. With a perpendicular bisector, the bisector always crosses the line segment at right angles (90°). ...

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Answer 2

according to your questions the

as ifEF pass through the the mid point of the Of AB