W1

Решение:

Для треугольника ABC:

\( \angle B = 180^{\circ} - 146^{\circ} = 34^{\circ} \)

\( \angle C = 180^{\circ} - ( \angle A + \angle B) \)

\( \angle C = 180^{\circ} - (34^{\circ} + 34^{\circ}) = 180^{\circ} - 68^{\circ} = 112^{\circ} \)

Ответ: \( \angle B = 34^{\circ} \), \( \angle C = 112^{\circ} \).