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how do you find the sum of the angles in a quadrangle

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The sum of the angles in a quadrangle without using a protractor.

sum-of-angle-measures

asked Nov 26, 2013 in GEOMETRY by linda Scholar

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1 Answer

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Quadrangle have four sides, and the sides are not intersect each other like rectangle,squre .

Diagonals of quadrangle forms two triangle with thier sides.

Sum of the angle of triangle = 180

therfore 2 triangles have 180+180 = 360

sum of quadrangle is 360 degrees.

answered Dec 16, 2013 by friend Mentor

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