Which of those angles is obtuse?

α_{0} = 111^{\circ} α_{0} > 90 ° α_{0} > 180 ° 111 ° = 1

α_{1} = 113^{\circ} α_{1} > 90 ° α_{1} > 180 ° 113 ° = 1

α_{2} = 47^{\circ} α_{2} < 90 ° α_{2} < 180 ° 47 ° = 0

α_{3} = 85^{\circ} α_{3} < 90 ° α_{3} < 180 ° 85 ° = 0

α_{4} = 13^{\circ} α_{4} < 90 ° α_{4} < 180 ° 13 ° = 0

α_{5} = 157^{\circ} α_{5} > 90 ° α_{5} > 180 ° 157 ° = 1

α_{6} = 172^{\circ} α_{6} > 90 ° α_{6} > 180 ° 172 ° = 1

α_{7} = 117^{\circ} α_{7} > 90 ° α_{7} > 180 ° 117 ° = 1

α_{8} = 54^{\circ} α_{8} < 90 ° α_{8} < 180 ° 54 ° = 0

α_{9} = 186^{\circ} α_{9} > 90 ° α_{9} > 180 ° 186 ° = 0

Angles