Answer the questions about a segment in a plane:
a. how many midpoints does the segment have?
b. how many bisectors does it have?
c. how many lines in the plane are its perpendicular bisectors?
d. how many lines in space are its perpendicular bisectors?

1. A segment can have only 1 midpoint.
2. The bisector divides the segment into two equal parts. Thus, there are infinite number of lines that can be a bisector to the given segment. The lines differ only in orientation.
3. There is only 1 among the bisector that is perpendicular to the segment.
4. There are infinite perpendicular bisectors in the space. 

32

step-by-step explanation:

these are your clues: 1. kim ran 18 races2. this was four fewer races than twice thenumber, notice it says twice the number, so you would do the equation 18x2-4; which equals the number 32.thus, 32 is your answer.