# 完全圖

K7，含有7个顶点的完全图

n(n − 1) / 2

${\displaystyle K_{1}}$ ${\displaystyle K_{2}}$ ${\displaystyle K_{3}}$ ${\displaystyle K_{4}}$
${\displaystyle K_{5}}$ ${\displaystyle K_{6}}$ ${\displaystyle K_{7}}$ ${\displaystyle K_{8}}$