Prove that sum of 4 angles in a quadrilateral is 360 ?

1 Answer
Shwetank Mauria
Feb 18, 2018

Just draw a diagonal dividing quadrilateral in two triangles. Sum of four angles of quadrilateral is same as sum of six angles of two triangles. As sum of angles of a triangle is #180^@#, that of quadrilateral is #180^@+180^@=360^@#

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