How many edges are in K15, the complete graph with 15 vertices

well, since

Kn has n(n-1)/2 edges, plug in n=15

Surely your text has presented that fact.

How many edges are in K15, the complete graph with 15 vertices? help

To find the number of edges in a complete graph with n vertices, you can use the formula:

Number of Edges = (n * (n - 1)) / 2

In the case of K15 (the complete graph with 15 vertices), we can substitute n = 15 into the formula:

Number of Edges = (15 * (15 - 1)) / 2
= (15 * 14) / 2
= 210 / 2
= 105

Therefore, K15, the complete graph with 15 vertices, has 105 edges.