2007-06-05 07:45:53 · 10 answers · asked by Word 1 in Science & Mathematics ➔ Mathematics
All of those answers are great, But this Shape Is kind of shaped like a very rounded triangle.
2007-06-05 08:01:25 · update #1
Maybe you are thinking of the Reuleaux Triangle. (It looks like a rounded triangle.)
http://mathworld.wolfram.com/ReuleauxTriangle.html
2007-06-05 07:58:13 · answer #1 · answered by raz 5 · 0⤊ 0⤋
They are called rouleaux shapes, because they will work as rollers. Generally speaking, when you turn a piece of metal or wood on a lathe, what you get is not in fact circular, but it will have a perfectly constant diameter (it's probably not a bad circle, but it will usually be off, and it won't be good enough for a high precision bearing surface). The same is true of a hole that is bored or drilled. These holes have to have their circularity improved with a reamer. In order to get really good circularity, shafts have to be ground with an abrasive wheel. Grinding exerts much less force on the object, and heating can be controlled better as well.
You can construct such a shape by starting with an equilateral triangle, placing a compass at each vertex set to the length of a side, and swinging an arc which spans the side opposite the vertex you have chosen. There are many very odd-looking rouleaux shapes.
2007-06-05 15:01:48 · answer #2 · answered by donaldgirod 2 · 0⤊ 0⤋
The general name is a "curve of constant width". One example is to start with a triangle, and extend each side by the same small amount. Join the big gaps by an arc centred on the opposite vertex, and the small gaps by an arc centred on the nearest vertex. I don't think there is a particular name for this instance of such a curve.
The Reuleaux triangle is the degenerate case of what I have described above, when the sides are not extended at all, and the perimeter is just 3 large arcs.
The British 50p piece is a curve of constant width based on a regular heptagon. Each side is replaced by an arc centred on the opposite vertex.
2007-06-05 17:51:50 · answer #3 · answered by bh8153 7 · 0⤊ 0⤋
I'd say sphere, except that a sphere is really just a circle with an extra dimension. It is a circle rotated through it's diameter.
2007-06-05 14:51:01 · answer #4 · answered by Izzy F 4 · 1⤊ 1⤋
Sphere??
2007-06-05 14:48:43 · answer #5 · answered by sweet n simple 5 · 0⤊ 1⤋
A sphere.
2007-06-05 14:48:35 · answer #6 · answered by JLynes 5 · 0⤊ 1⤋
Spheres and cylinders.
2007-06-05 14:49:42 · answer #7 · answered by cattbarf 7 · 1⤊ 1⤋
A square?
2007-06-05 14:49:38 · answer #8 · answered by comicfreak33 3 · 0⤊ 1⤋
sphere
2007-06-05 14:55:35 · answer #9 · answered by Anonymous · 0⤊ 1⤋
SPHERE
2007-06-05 14:49:15 · answer #10 · answered by pioneers 5 · 0⤊ 1⤋