29. Find the missing angle.

In triangle NKM, we are given \(\angle K = 100^\circ\) and \(\angle M = 20^\circ\). The sum of angles in a triangle is \(180^\circ\).
So, \(\angle N + \angle K + \angle M = 180^\circ\).
\(\angle N + 100^\circ + 20^\circ = 180^\circ\).
\(\angle N + 120^\circ = 180^\circ\).
\(\angle N = 180^\circ - 120^\circ\).
\(\angle N = 60^\circ\).

**Answer: \(\angle N = 60^\circ\)**