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A non-convex polygon is any polygon with at least one interior angle measuring at least 180 degrees. . A polygon is defined as an area enclosed by 3 or more line segments connected at their endpoints. Basically, the figure needs to be completely closed in, have no extra lines or part of lines coming out of it, and no curves. For a polygon to be convex all of its interior angles need to measure less than 180 degrees.

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Q: What are non convex polygons?

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A convex polygon is one with no reflex angles (angles that measure more than 180 degrees when viewed from inside the polygon). More generally a convex set is on where a straight line between any two points in the set lies completely within the set.

Yes.

A polygon is convex if you can take any two points inside the polygon and connect them with a line segment that is completely contained by the polygon. A non-convex polygon is one which contains at least two points such that the line joining them does not lie entirely inside the polygon.

All regular polygons with an even number of sides. Irregular polygons with an odd number of sides can have parallel sides. There are also non polygonal shapes that can have parallel sides.

Not all polygons are regular by definition. An irregular polygon may have non-congruent sides or non congruent angles or both. A regular polygon will always have both congruent sides and angles.

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Convex polygons with congruent sides and congruent angles are called regular polygons.

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In a non-convex (or concave) polygon, at least one interior angle is a reflex angle. An alternative definition is that if you take any two points inside a conves polygon, the line joining them is wholly inside the polygon.

Regular polygons are always convex by definition.

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These terms describe polygons. To identify a polygon as convex, we draw a segment from any vertex to any other vertex. This segment cannot go outside of the polygon. Non-convex is concave. If we draw a segment from a vertex to any other vertex, at least one of the segments will go outside of the polygon.

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They are both convex polygons.

A concave polygon has at least one interior angle greater than 180 degrees. A convex polygon has none of those.

6,776 growing, including convex and concave polygons, constructible polygons, cyclic polygons, and so much more

A non convex is a concave and a convex is differently shaped

Pick's theorem can't use for non-convex polygons. It needs at least 3 terms to define an area of a polygon.