3 sided closed shape
An equilateral triangle can not have "other" shapes.
a triangle
square,triangle
anything smaller than the triangle
equilateral triangle, isosceles triangle, and theres more but i forgot.
Because triangle are shapes too
triangle
triangle.
Triangle
triangle
A triangle has only one face and, not surprisingly, its shape is a triangle.
There are technically many shapes that could be put into the form of a triangle, but only triangles can make real triangles (without getting into more complicated shapes).