Угол C = 90°.
∠A : ∠B = 2 : 1
∠A = 2x, ∠B = x
2x + x = 90°
3x = 90°
x = 30°
∠B = 30°
∠A = 2 * 30° = 60°
Ответ: ∠A = 60°, ∠B = 30°