Circles, some triangles, and irregular polygons
They need to convert rotational motion to motion of some other form - usually linear motion. That can only be accomplished through the use of specific irregular shapes.
Any regular polygon. And some irregular polygons which will have some adjacent sides equal - for example, a kite or an arrowhead (chevron).
There are a lot more than 4 types. Some simple examples: regular polyhedra, other polyhedra, star shapes, ellipoids (including spheres), toroids (like cycle inner tubes), shapes with two "holes" in them, totally irregular blobby shapes.
You get the area by using formulas. There is usually a specific formula to find the area of each shape. Some irregular shaps may not have a formula.
Some polygons are irregular, but many irregular shapes are not polygons.Another answer: Yes
Pentagons have 5 sides and they can be regular or irregular
spiral, barred spiral, elliptical, irregular, and peculiar
Circles, some triangles, and irregular polygons
An irregular topology can be defined as a network that is not usual. However, networks take different a shapes and routes and the irregular topology might in some cases be the best option.
They collided with another galaxy
because it was made like that
Plane figures. There are infinitely many of them - some regular, others irregular.
They need to convert rotational motion to motion of some other form - usually linear motion. That can only be accomplished through the use of specific irregular shapes.
Asteroids are typically rocky or metallic bodies that orbit the sun and can vary in size from a few meters to hundreds of kilometers. They do not have an atmosphere or geological activity like planets, and many have irregular shapes due to impacts and collisions in space. Some asteroids have moons or rings, and their compositions can include metals like iron and nickel, as well as silicate minerals.
A regular polygon has all its angles and equal and all its sides equal. Irregular poygons do not. Some people consider only convex shapes meeting these criteria as being regular polygons while others include "star" shapes.
Any regular polygon. And some irregular polygons which will have some adjacent sides equal - for example, a kite or an arrowhead (chevron).