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Question
Use the following figure to find the value of x
Solution
The sum of exterior angles of a quadrilateral
⇒ y + 80° + 60° + 90° = 360°
⇒ y + 230° = 360°
⇒ y = 360° – 230° = 130°
At vertex A,
∠y + ∠x = 180° (Linear pair)
x = 180° – 130°
⇒ x = 50°
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