Math crossword puzzle

2. A segment which joins two consecutive vertices
4. The minimum number of votes
6. a single-winner election method in which voters rank options or candidates in order of preference.
8. A chain of communication that send and receive messages of various types.
11. specialized series of steps
12. to divide/ allocate
13. the number your diving by
14. A path that begins and ends at the same vertex
16. endpoint of an arc
18. the number of votes cast for a candidate who receives more than any other but does not receive an absolute majority.

1. Ballot ballot where the voter indicates only their 1st place choice.
3. an electoral system whereby voters rank candidates in order of preference.
5. piece of paper you vote on
7. total number of anything in a certain area
9. manipulate the boundaries of an electoral constituency so as to favor one party or class
10. a position in a scale of achievement or status; a classification.
15. a surface or solid formed by rotating a closed curve
17. A path that contains all the arcs of a directed graph exactly once.