trianle have no faces, because it is 2D figure.
None. A triangle is a 2-D figure, not a 3-D figure. Therefore, the concepts of faces and bases do not apply to it.
Such a figure is a triangle-based prism.
pyramid
triangle i guess
triangular prism
triangular-based prism
a pyramid
triangle based pyramids
pyramid
four triangle faces.
The face of a triangle is the flat surface of the solid figure. _________________________________________________ A face is a side of a 3 dimensional figure. So, the number of faces a triangle would be 0.