Wouldn't a 3 dimensional Moebius tape technically have two sides
There is no such thing as an object with two sides.
A PLANE has two sides
There is no such object.
It could be an angle with either two sides or two rays. If it's a closed object then it might be like the letter D. Or like a crescent (quarter moon).
isosceles triangle
There is no such thing as an object with two sides.
A PLANE has two sides
There is no such object.
bilateral
It could be an angle with either two sides or two rays. If it's a closed object then it might be like the letter D. Or like a crescent (quarter moon).
A two-dimension shape with eight sides is an octagon. A three-dimensional object with eight sides is an octahedron.
isosceles triangle
I clyinder is like a can. An object with two circular bases and round sides.
If an object is symmetrical, it means that both sides are equal in size. In the word WHISPER, the letter H and the letter W both have symmetrical sides.
I can see two possible answers to this question:There exists no three-dimensional object with only two sides.Picture a two-dimensional circle. Now put it in the third dimension and inflate the center of it a little bit. It would be like a coin, but the edges of both sides converge to a single edge. This may or may not count as a "three-dimensional object with two sides," depending on various possible definitions of the words in that phrase.
Concave means that there is a dip in the object, like it has caved in. Bi-concave means that it is dipped in on two sides of the object. A good example is a red blood cell. It is a bi-concave disk - it has dips on two sides of it.
A face is the flat surface of an object (2 or 3 dimensional). An edge is when two sides (faces) meet on an object. A vertex is the corner of an object, where an angle exists between two or more lines.