Any letter-
x, n, p....
YOU CHOOSE!
Hgghh
3,6
Given three vertices, the two that are the furthest apart lie at the ends of a diagonal. Reflect the square in this diagonal. The third vertex will be where the missing vertex should be.
you can name a vertex with b
a vertex
A vertex
You could call the vertex, the apex, the tip, or the point of the cone.
Vertex mate :) 3 or more is a vertex
osama waris
turning point
The vertex
It is the apex or vertex