∠AOB + ∠BOC = ∠AOC = 90°
x + x + 20 = 90
2x = 70
x = 35
∠BOC = 35°
∠AOB = 20 + 35 = 55°
ответ: 35°; 55°.
∠AOB + ∠BOC = ∠AOC = 90°
x + x + 20 = 90
2x = 70
x = 35
∠BOC = 35°
∠AOB = 20 + 35 = 55°
ответ: 35°; 55°.