How to bisect a LINE SEGMENT
STEP 1: Draw a straight line with a ruler.
STEP 2: Put the pin of a compass at the end of the line you want to bisect, Set the compass to more than half the length of the line, and draw two arcs to the top and bottom of the line.
STEP 3: Keep the width of the compass the same, and from the opposite end of the line draw another arc to intersect the first two arcs.
STEP 4: use ruler to connect the two points of intersections.
