A wheel and axle
block & tackle
gear or gears
any where in the world a squire is a squire, like triangle , pentagon, etc all objects are same but they pronounce in different languages but come to the shape of the objective is represented by the same symbol.
Machines are inanimate. Machines do not eat, sleep, rest, breathe, and they do not have a heart beat. Machines are just objects, inanimate objects for the use of humans.
reflect light well-normally shinysmooth pale colour objects: mirror, glass, shiny metal, tin foil...these objects favour a good image due to the reflection of light is regular do not reflect light well-usually rough, matt , dark colured objects: tree trunk, car wheel, dark carboard, brick, stone, dark opaque plastic... These objects diffuse the picture or do not giva a picture at all because reflected light is irregular.
block & tackle
the wheel and axle is a simple machine made from two circular objects and are different sizes that are attached and rotate together and it is a lever that can rotate to 360 degrees
wheel and axel
gear or gears
quarters
If there are n objects and you have to choose r objects then the number of permutations is (n!)/((n-r)!). For circular permutations if you have n objects then the number of circular permutations is (n-1)!
when the arrangement of the objects is ina circular fashion eg. if you took a photo of your mums @#$#@# that would be circular composition
Gears. Gears are circular objects of different sizes that are attached in such a way that they rotate together to transmit motion.
That's a good question. I have never thought about that. But yes, for anything excluding circular objects, length and width are used.
Orbits sould be circular because the centripetal force that keeps objects in circular motion is constant (it is gravity!)
to be made up of/from other objects
because the objects hitting it would hit then the impact would create a circular shape