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Question
Find the value of the unknown x and y in the following diagram:
Solution
y = 90° (Vertically opposite angles)
x + x + y = 180° (Angle sum property)
2x + y = 180°
2x + 90° = 180°
2x = 180° − 90°
2x = 90°
x = `(90°)/2`
x = 45°
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