A semi-circle is actually a specific type of shape known as a "regular" shape. A regular shape is one that has all sides and angles equal. In the case of a semi-circle, it has a curved side and a straight side, but the curved side is a perfectly round half-circle, making it a regular shape. Irregular shapes, on the other hand, do not have sides or angles that are equal.
It is an irregular shape or polygon that doesn't have all sides equal
The shape that has not got equal side is a rectangle
Here are three: equilateral triangle, square, and cube
it has to have equal angles, not side lengths. otherwise it would just be two of the same shape
It is polygon but this type of shape is a nonagon.
Pentagon ,,,, 180 digr
An isosceles triangle is one of them
The answer depends on what shape the question is about.
square
An isosceles triangle has two equal sides and one different side.
regular pentagon maybe maybe not