2) 3 (т.к ∠HCB = ∠A, а ∠DCB = 45°).
3) 70° ((180– 40)/2= 70).
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1) 2 (т.к.треугольник равносторонний).2) 3 (т.к ∠HCB = ∠A, а ∠DCB = 45°).
3) 70° ((180– 40)/2= 70).