it is a 3 dimentional triangle ... it can be a pyramid with 5 sides ... or one with four sides
cube
Tetrahedron or triangular pyramid.
2D - the triangle 3D - the tetrahedron (i.e. it has a triangle on each side and there are 4 sides.
A triangle - any triangle - has 3 sides.
it is a 3 dimentional triangle ... it can be a pyramid with 5 sides ... or one with four sides
If it's a proper 3D triangle, it's a tetrahedron. It has four sides, all triangular. If it has four triangular sides and a square base, it's a pyramid.
A 3-D TRIANGLE cannot have 5 sides.
1 Face (2D) 4 Faces (3D) 3 Sides 3 Points, and 2 Congruent sides.
cube
Tetrahedron or triangular pyramid.
2D - the triangle 3D - the tetrahedron (i.e. it has a triangle on each side and there are 4 sides.
1
A triangle has three sides.
A triangle - any triangle - has 3 sides.
A triangle has three sides.
A triangle has three sides !