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Question
Find the value of the unknown x and y in the following diagram:
Solution
y + 120° = 180° (Linear pair)
y = 180° − 120° = 60°
x + y + 50° = 180° (Angle sum property)
x + 60° + 50° = 180°
x + 110° = 180°
x = 180° − 110°
x = 70°
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