Let Angle MLN = x ;
Angle KLQ = 90 - x (supplementary Angles )
in Triangle LMN , Angle LMN = 90- x ( Angle sum of Triangle )
in triangle QKL, Angle QKL = x ( Angle sum of trangle )
....
Angle MLN = Angle QKL ( x )
Angle LMN = Angle KLQ ( 90 - x )
Angle MNL = Angle KQL ( right angles...