Răspuns:
180°-90°=90°
45°-10°=35°
127°-27°=100°
50°-25°=25°
75°-15°=60°
100°-30°=70°
80°-40°=40°
40°-20°=20°
32°-12°=20°
60°-30°=30°
180°+90°=270°
45°+10°=55°
127°+27°=154°
50°+25°=75°
75°+15°=90°
100°+30°=130°
80°+40°=120°
40°+20°=60°
32°+12°=44°
60°+30°=90°