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Question
The angles of a quadrilateral are 110°, 72°, 55° and x°. Find the value of x.
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Solution
\[\text{ The sum of anlges of a quadilateral is } 360°. \]
\[\text{ So, we get } 110° + 72° + 55° + x = 360° \]
\[ \Rightarrow 237°+ x = 360° \]
\[ \Rightarrow x = 360° - 237° \]
\[ \therefore x = 123° \]
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