How many perpendicular bisectors can be constructed for a line segment? a.) 0. b.) 1. c.) 2. d.)infinitely many

The perpendicular bisector of any line segment is the straight line 
perpendicular to that line segment through the midpoint.
Therefore,
Any line can have only 1 mid point and hence you can draw only 1 perpendicular bisector.

A= r2 × 3.14 7x7 ↓ ↓ 49 × 3.14 = 153.86 → 153.9