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Understanding Quadrilaterals — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSUnderstanding Quadrilaterals2 Marks
Question
Find the angle measure $x$ in the below figure.
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Answer

$x + (180^\circ – 90^\circ ) + 60^\circ + 70^\circ = 360°$ [By angle sum property of a quadrilateral]
$\therefore $ $x + 220^\circ = 360^\circ $
$\therefore $ $x = 360^\circ – 220^\circ $
$\therefore $ $x = 140^\circ $

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