A vertex is a corner of a triangle and its plural is vertices
The vertex of a triangle is any one of its three corners.
It is the altitude.
the fire trangle is the trangle that is on fire
Triangle
180
a+b+c
A triangle has 3 vertices
1
Eqiilateral trangle i
A scalene triangle.
Take a different route...
A rectanglular is a trangle
Right Triangle