I just bought some long life milk in travel sized containers. It is packed in small ’ ‘cartons’ which are formed by pinching the two ends of a cylinder together at 90 degrees to each other, creating a container with only three triangular faces, six edges and four vertices.
Does this solid have a name?
I’m having a hard time imagining the shape you are describing. Are you sure you don’t mean four triangular faces? I remember frozen orange juice that used to be sold in the US (maybe still is?) in containers shaped like this.
It’s a type of triangular pyramid.
Too late to edit, but I see that there is a Minute Maid product in the same shape, which doesn’t seem to have an agreed upon name.
If you ignore any rounding where the (four) faces meet, it’s definitely a tetrahedron. The other answers in the reddit link were mathematical jokes. (We’re hilarious, we are.)
Many people will at first glance say that this is a stack of three balls. A different viewing angle reveals otherwise. I suspect a similar thing is going on here.
If that’s what the OP is referring to, the manufacturer calls it a Tetra Classic Aseptic carton, and says that the shape is a tetrahedron.
It’s certainly a tetrahedron. It’s probably not a regular tetrahedron, but it is at least an isohedral isosceles tetrahedron.
I’d say it’s an approximation of a tetrahedron. It would be a tetrahedron if the sides were creased so that it had sharp edges and 4 flat sides. In its normal configuration, with curved sides, it’s not any kind of polyhedron.
Yes, it’s called the configuration that your milk supplier chooses to deliver your milk… Define it as you please.:rolleyes: How would old school nitpics describe a glass milk bottle?
Sharp edges and flat sides as modifications are not sufficient for it to be a regular tetrahedron, the original shape would still have four long edges and two short ones. I think it’s this stretched tetrahedral shape the OP refers to.
So what exact geometrical definition would you describe the OP question as?
This. It doesn’t have a strict name because those sorts of names are reserved for things composed of planar faces. Which this thing doesn’t have. IOW, gogogopher’s Q above is out of order.
if you want a descriptive term, it’s an isosolese irregular quasi-tetrahedron with some, not all, rounded edges and curved surfaces.
No one in this thread claimed it was a regular tetrahedron. A polyhedron with four triangular sides is by definition a tetrahedron, even if it isn’t regular.
Suit yourself… So what is “the” answer?
“The” answer is a tetrahedron. It’s not a regular tetrahedron, which has 4 equilateral triangles as faces, but it’s a tetrahedron.
1d4
Or, perhaps per LSLGUY: it’s an isosolese irregular quasi-tetrahedron with some, not all, rounded edges and curved surfaces.
Ok, so the OP has conclusively been answered:confused:
Thank you.
So, LSLGuy, how was my question out of order?
Just curious. Inside joke, or simply over my head?
Thanks.
