An example of an irregular polygon is:

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Scalene triangle

Square

Equilateral triangle

Pentagon

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Detailed Solution

Concept-
Polygons are two-dimensional geometric shapes created by joining points and straight lines to form a closed shape. In contrast to regular polygons, which are polygons with equal sides and equal angles, irregular polygons are polygons with unequal angles and sides.
Scalene triangle: A scalene triangle is a triangle that has three sides of various lengths and three angles of various sizes. It is therefore an irregular polygon. Square is a standard quadrilateral having four sides and four angles of equal length. Therefore, it is not a polygon with irregular edges. If all three of a triangle's sides are the same length and all of its angles are equal, the triangle is said to be equilateral. Therefore, it is not a polygon with irregular edges.
Pentagon: A pentagon is a five-sided and five-angled geometric shape. It is therefore an irregular polygon.
Hence, the correct answers are option 1 and 4 i.e. Scalene triangle and pentagon respectively.

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