They can.
vector, vertex, vertical
No.
A cone has only one vertex (the apex).
minimum point
Yes, since the vertex is a point and the vertical angles share that point.
They can.
That is the correct spelling of "vertices", the plural of the term vertex.
have the same vertex. be congruent.
It is called a vertex.
vector, vertex, vertical
No.
Vertical is the adjective form of the English noun vertex, which comes from the Latin word vertex. The root word is vertere, meaning "to turn".
not all congruent angles are vertical angles. Vertical angles must share a vertex.
A trapezium.
A cone has only one vertex (the apex).
minimum point