Which of the following steps is not part of constructing a perpendicular line to the given line? . a) put any point above or below the line. b) draw two intersecting cars above the line, equidistant from the line.. c) draw two arcs on the line equidistant from point f.. d) use a compass to draw two arcs, equidistant from the line, one above and one below.

 (a) Put any point below and above the line.

Step-by-step explanation: To draw a perpendicular line to a given line, at first we need to construct two arcs from a particular point on either side, which is step (c). Then, we need to draw two arcs from the points of intersection of the already drawn arcs on the line, which is step (b). Finally, we  apply step (d) to complete the process. The only useless step is step (a).

Thus, the correct option is (a).

31.4

Step-by-step explanation:

Circumference = 2 × pi × r

C = 2 × 22/7 × 5

C = 220/7

C = 31.4