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Take any quadrilateral , say ABCD .Di...

Take any quadrilateral , say ABCD .Divide it into two triangles by drawing a diagonal . You get six angles 1,2,3 ,4,5 and 6 . Use the angles sum property of a triangle and argue how the sum of the measures of `angleA,angleB,angleCangleD` amounts to `180^(@)+180^(@)=360^(@)` .

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The correct Answer is:
`360^@`
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