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I would have asked this on a math community but I couldn't find an active one.
In a spherical geometry, great circles are "straight lines". As such, a triangle can have two or even three right angles to it.
But what if you go the long way around the back of the sphere? Is that still a triangle?
(Edit:) I guess it's a triangle! Fair enough; I can't think of what else you would call it. Thanks, everyone.
The term you are looking for to describe such a shape is technically "spherical polygon". Triangles are impossible in speherical geometry since the sum of the angles would always be greater than 180°.
There is no rule that the angles of a triangle add to 180 degrees. It only holds true in Euclidean geometry, which this is not.
Yes, it has three corners and three edges. It is a triangle.
What if it had 3 corners and 4 edges? Or 4 corners and 3 edges?
If a shape has 3 corners and 4 edges, it is incomplete or open and therefore not a shape yet but a collection of edges (or possibly, two triangles that share an edge).
A shape with 4 corners and 3 edges is not possible. An edge cannot have a corner in the middle of it, that would make it two edges.
It's got three angles, so I'd say so
Oh so that's why they call it that.
Just wait until you learn about the etymology of triceratops
It's got three ceratops of course
Three knights can ride it; tri-sir-atop.
Yes, but to be more specific, it is a spherical triangle.
Spherical isosceles triangle, in this particular example.