The m angle KHL and m angle FHL is 49°.
Since angle LKH and angle LFH are two right triangles and has
a common side.
The two triangles LKH and LFH are congruent.
So 74° =154 +142°
74 = 54+14
74-5Y=14
2y=14
Y = 7
m<KHL = M<FHL = 71°
m<KHL = M<FHL= (x7)°
(x7)°=7x7
m<KHL = M<FHL =49°