Răspuns :
a+b=180
a=11b
11b+b=180⇒12b=180⇒b=180:12=15°⇒b=15°
a=11×b=11×15=165°
unghiurile au 15°, respectiv 165°
verificare
a+b=180
165°+15°=180°
a=11b
11b+b=180⇒12b=180⇒b=180:12=15°⇒b=15°
a=11×b=11×15=165°
unghiurile au 15°, respectiv 165°
verificare
a+b=180
165°+15°=180°