Ответ: 290° .
∠1=35° ⇒ ∠3=180°-35°=145°
∠3=∠4 ⇒ ∠3+∠4=2*145°=290°
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Ответ: 290° .
∠1=35° ⇒ ∠3=180°-35°=145°
∠3=∠4 ⇒ ∠3+∠4=2*145°=290°