A polygon is convex if, for every pair of points, P and Q belonging to the polygon, the line segment PQ lies completely inside or on the polygon.
Which one of the following is NOT a convex polygon?
(A) A
(B) B
(C) C
(D) D
Answer: (A)
Explanation: It these any two points are inside in polygon, then line by joining these points will also be inside same polygon.
Polygon in first image is not a convex because if you take any two corner points then it will not be inside the polygon.
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