no
Yes.
there is a lot like irregular shapes
You would call the group of shapes which has at least one line of symmetry symmetrical shapes. Stars, circles, and rectangles are considered symmetrical shapes.
A snitch and the deathly hallows symbol are both symmetrical shapes.
Where it has to do with symmetrical shapes and there equations.
Symmetrical
When they are circumscribed by an Arctic Circle.
Spheres are symmetrical in every possible direction. Any way you slice or rotate the sphere from the middle, it's going to be symmetrical. There are plenty of other 3D shapes with a lot of symmetry, just not in every possible direction.
what are the 2d shapes of the real world
symmetrical shapes
Yes because they are 'mirror images'
The most basic answer would be a square, which is both symmetrical and regular. However, rectangles are also symmetrical, as are hexagons with two opposing 90° angles and four matching 135° angles. In fact, the number of potential shapes are infinite, unless you specify exactly how many right angles the shape must have.