Answer:
The value of ∠LPM is 60°
Explanation:
It is given that a straight line is 180° and line LN is a straight line. So in order to find angle LM, you have to substract angle MN from 180° :
∠LPN = 180°
∠MPN = 120°
∠LPM + ∠MPN = 180°
∠LPM = 180° - ∠MPN
= 180° - 120°
= 60°