The angles of quadrilateral are respectively $100, 99, 92$ and find the fourth angle.

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Solution

Sum of all the angles of a quadrilateral equals $360^{\circ}$

Let "x" be the fourth angle.

$100 + 99 + 92 + x = 360$

$x = 360 - (100 + 99 + 92)$

$x = 69^{\circ}$

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