What is the sum of all four
angles of a concave quadrilateral? is true for convex quadrilateral? justify your answer
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Answer: The sum of all four
angles of a concave quadrilateral is 360°. It does not matter whether the quadrilateral is concave or convex, the sum of all the four angles present in the concave or the convex quadrilateral is always 360°.
When the sum of the interior
angles of any quadrilateral is measured then it is done by breaking the quadrilateral into two triangles. The sum of the triangle is 180°.
Therefore, 180°+ 180°= 360°
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