A quadrilateral is a closed shape and a polygon with four sides, four vertices, and four angles. It is formed by joining four non-collinear points. Irrespective of the shape and size of a quadrilateral, the sum of its four angles always remains the same. This is called the angle sum property of a quadrilateral. Let’s understand what is angle sum property of quadrilateral with examples. Angle Sum Property of Quadrilateral A quadrilateral is a 2D geometric figure with four sides, four angles, and four vertices.
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