- #1
TheMathNoob
- 189
- 4
Homework Statement
Prove that a complete graph with n vertices contains n(n − 1)/2 edges.
Homework Equations
The Attempt at a Solution
The solution gives and inductive proof, but I am just wondering if this works as well.
If we have a set of n vertices or points and we try to match all possible number of vertices, then the final outcome will be a complete a graph. The equation to produce this matching is n choose 2 which equals n(n-1)/2