Which tool is not needed to construct a perpendicular bisector?

A: compass

B: pencil

C:protractor

D: straightedge

C:protractor

Step-by-step explanation:

A compass is needed to draw arcs that are used to determine the position of the perpendicular bisector

A pencil works hand in hand with the compass

A straightedge is used to draw straight line that will be the bisector.

Note that a protractor is used to measure angles and not to construct angles.

A compass because youre just making two arcs