What are the secondary parts of a triangle?

Question

Geometry

Answer 1

Hello :-)

The secondary parts of a triangle are the triangle's sides and angles. The primary part being the triangle.

This can be taken a step further to include the exterior angles of the triangle, but I don't think this is a necessary detail.

:-)

Answer 2

As far as I can tell, the secondary triangles of an equilateral triangle are smaller triangles that each have a side length equal to one third of the original triangle's side length. There are three of them, and they are located such that they each share the middle third of one leg of the larger triangle and meet at the center. There is a good illustration in my reference.