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Question
Three angles of a quadrilateral are respectively equal to 110°, 50° and 40°. Find its fourth angle
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Solution
Given
Three angles are 110°, 50° and 40°
Let fourth angle be 𝑥
We have,
Sum of all angles of a quadrilaterals = 360°
110° + 50° + 40° + x° = 360°
⇒ x = 360° - 200°
⇒ x = 160°
Required fourth angle =160° .
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