Question

a polygon must have a diagonal in the exterior​

Answer 1

Answer:

The answer is (true) hope it will helpful

Answer 2

Answer:

concave polygon

hope it helps

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step by step explanation:

Some of the diagonals of a concave polygon will lie outside the polygon. In the figure on the right, the diagonal at the top of the polygon is outside the polygon's interior space. (In a convex polygon, all diagonals will lie inside the polygon). Regular Polygons are never concave by definition.