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The three angles of a quadrilateral are respectively equal to 110°, 50° and 40°. Find its fourth angle.

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The three angles of a quadrilateral are respectively equal to 110°, 50° and 40°. Find its fourth angle.

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We know that Sum of angles of a quadrilateral is = 360°

So,

110° + 50° + 40° + x° = 360°

x° = 360° – 200°

x° = 160o

∴ Value of fourth angle is 160o

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