Question

line jl and line km intersect at point h. find the three unknown angle measures in the figure.
first, find ( mangle khl ).
( mangle khl = 129 )
now, find ( mangle lhm ).
( mangle lhm = )

Explanation:

Step1: Use the property of vertical angles

Vertical angles are equal. $\angle LHM$ and the angle of $51^{\circ}$ are vertical angles.

Answer:

$51$