For example an irregular and a regular octagon are alike because:-
They both have 8 sides
They both have 8 exterior angles that add up to 380 degrees
They both have 8 interior angles that add up to 1080 degrees
They both have 20 diagonals
They both can be cut into 6 triangles
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regular polygons have all sides and angles congruent but irregular polygons only need to have a certain amount of sides
Yes, a regular polygon has all sides of equal length. An irregular polygon is any polygon that is not regular.
The polygons in the mosaic are alike in that they share common characteristics such as having straight edges and defined vertices. However, they differ in terms of their shapes, sizes, and angles; some may be regular polygons with equal sides and angles, while others are irregular. Additionally, the arrangement and color patterns of the polygons can vary, affecting the overall visual impact of the mosaic.
Regular, although the term is more usually used with polygons and polyhedra.
There are regular polygons (with 3, 4 and 6 sides).There are irregular convex polygons (with 3, 4, 5 or 6 sides). There are [irregular] concave polygons with various numbers of sides.