triangle * * * * * A triangle is NOT a 3d shape! A cube.
is it a vertex
The question is not particularly clear but I suspect that the answer is a vertex.
I think this means, what is the plural of vertex?? If so, then the answer - vertices. My daughter and I searched for ages thinking the question was looking for the name of a 3d shape!!
It is a cone.
corner is an other word for vertex it is the corner of a 3d shape
Almost any 2D/3D shape has more than one vertex. Triangles, squares, rectangles etc. etc.