B10. Прямые a и b параллельные. Угол 8 на 55° больше угла. Найти все углы.
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Given: a || b ; angle 8= 55°
To Find: angle 5=?
Solution-->
<8 + <5 = 180°_____adjecent angles of parallel lines are supplementary
55° + <5 = 180°
<5 = 180° - 55°
<5 = 125°
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