Question

find l
∠l=180°
∠l=51°
∠l=39°
∠l=129°

Explanation:

Step1: Identify parallel lines and transversal

Lines \(l\) and \(m\) are parallel, \(n\) is a transversal.

Step2: Use corresponding angles property

Corresponding angles formed by a transversal with parallel lines are equal. \(\angle L\) and the \(51^{\circ}\) angle are corresponding angles. So, \(\angle L=51^{\circ}\).

Answer:

$\angle L = 51^{\circ}$