< LHM = 140
< LHM + < LHK = 180 (because these angles form a straight line)
therefore < LHK = 180 - 140 = 40
< LHK + < KHP + < PHJ = 180 (because these angles for a straight line)
40 + 20 + < PHJ = 180
60 + < PHJ = 180
< PHJ = 180 - 60
< PHJ = 120 <====
