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Bodies that are small and light (examples: moons of Mars) have low gravity and tend to have irregular shapes. Above a certain size, however, gravity is strong enough to overcome the strength of rock, forcing the body into a spherical geometry that minimizes surface area-to-volume ratio.

Q: Why do some space bodies have irregular shapes?

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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.

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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.

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).

There are different formulae for spheres, ellipsoids, cones and pyramids, paralellepipeds as well as some other shapes. For other shapes, including irregular shapes, the fluid displacement method may be the only option.