Question

which tool(s) are needed to construct a perpendicular bisector of a line segment? a a protractor only b a straight edge only c a straight edge and a compass d a straight edge and a protractor

Explanation:

To construct a perpendicular bisector of a line segment, we need to draw arcs (using a compass) to find points equidistant from the endpoints of the segment and then connect those points (using a straight - edge) to form the bisector. A protractor is used for measuring angles, which is not the main operation here. A straight - edge alone can't create the necessary arcs for the perpendicular bisector construction.

Answer:

C. A straight edge and a compass.