That is called a pyramid.
First, the 3 dimensional analogue of the triangle is the tetrahedron, and the answer is 4
A triangle with three equal sides is called a equalateral triangle.
A 3-d triangle, or a tetrahedron, has 4 vertices.
4
There is no such thing as a triangular box or cube. A 3-D triangle is called a pyramid.
It looks like a 3-D triangle.
it is called a triangle
A 3-D TRIANGLE cannot have 5 sides.
A three-sided, two-dimensional polygon is called a "triangle".
a scalene triangle
an equilateral triangle
I don't think it's a troanglo. I believe it's called a tetrodahn.
A 3-sided figure is called a triangle.
a triangle-based pyramid
the answer is triangle
If you mean can a triangle have 3 equal sides and the answer is yes it can and it is called an equilateral triangle.