Where faces meet there are edges and where edges meet there are verticies
Verticies
A cube has 6 sides 8 verticies and 12 edges
Reuleaux triangle
Cube
It is known as a regular polygon
Circumcentre.
It is called verticies or a vertex
I think it is "quadrangle". If it has 4 equal sides and 4 right angles, "square" is right.
This is a parallelogram.
trapezoid
Another mathematical name for chart is table, diagram or graph.
A five sided polygon is known as a pentagon. A regular pentagon has five even sides and five internal angles at 108 degrees each.