Question

draw a line segment AB = 8cm and draw its perpendicular bisector.

Answer 1

Steps:

Place the compass at one end of line segment.

Adjust the compass to slightly longer than half the line segment length

Draw arcs above and below the line.

Keeping the same compass width, draw arcs from other end of line.

Place ruler where the arcs cross, and draw the line segment.

Geometric Constructions

Answer 2

the answer is in the above pic