
The measurement of each of the internal angles is not equal. However, sometimes two or three sides of a pentagon might have equal sides but it is still considered as irregular.Ī hexagon is considered to be irregular when the six sides of the hexagons are not in equal length. And, ∠x ≠ ∠y ≠ ∠z, where ∠y = 90°.Ī pentagon is considered to be irregular when all five sides are not equal in length. In the right triangle ABC, the sides AB, BC, and AC are not equal to each other. Therefore, the lengths of all three sides are not equal and the three angles are not of the same measure. Hence, the rectangle is an irregular polygon.Ī right triangle is considered an irregular polygon as it has one angle equal to 90° and the side opposite to the angle is always the longest side. In the given rectangle ABCD, the sides AB and CD are equal, and BC and AD are equal, AB = CD & BC = AD. RectangleĪ rectangle is considered an irregular polygon since only its opposite sides are equal in equal and all the internal angles are equal to 90°. All the three sides and three angles are not equal. In the triangle, ABC, AB = AC, and ∠B = ∠C. All three angles are not equal but the angles opposite to equal sides are equal to measure and the sum of the internal angles is 180°. Thus, we can use the angle sum property to find each interior angle.Īn isosceles triangle is considered to be irregular since all three sides are not equal but only 2 sides are equal. Also, angles ∠P, ∠Q, and ∠R, are not equal, ∠P ≠ ∠Q ≠ ∠R. In the triangle PQR, the sides PQ, QR, and RP are not equal to each other i.e.

Scalene TriangleĪ scalene triangle is considered an irregular polygon, as the three sides are not of equal length and all the three internal angles are also not in equal measure and the sum is equal to 180°.

However, we are going to see a few irregular polygons that are commonly used and known to us. There are different types of irregular polygons.
