Question

the sum of angles of concave quadrilateral is- a)more than360° b)less than 360° c)equel to 360° d)twice of 360°​

Answer 1

As with any simple polygon, the sum of the internal angles of a concave polygon is π (n − 2) radians, equivalently 180°×(n − 2), where n is the number of sides. It is always possible to partition a concave polygon into a set of convex polygons.