prove that the sum of the angles of quadrilateral is 360
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784
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Step-by-step explanation:
If we draw one diagonal to quadrilateral we will get two triangles i.e. △ABC
and △ACD and we know that sum of the angles of a triangle is 180o
Sum of angles of quadrilateral ABCD=sum of angles of △ABC + sum of the angles △ACD
= 180o + 180o
= 360o
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