Explicație pas cu pas:
<MAQ = 150°; <PAQ = 60°
<MAP ≡ <NAQ
a)
<MAN = <MAP - <NAP
<PAQ = <NAQ - <NAP
=> <MAN ≡ <PAQ
b) <MAN ≡ <PAQ, <PAQ = 60°
=> <MAN = 60°
<NAP = 150° - 2×60° = 150° - 120°
=> <NAP = 30°
