I think vertex...
bisector
mk
Angle Apothem AxesAxiom
width
nonagon
V words in giver:VegVieVierVirge
in geometry, width
centagan: 100-gon
There is only one word that starts with the letter E an and with a V. This word is elov.
How about a decagon which is a ten sided polygon
The word you are looking for is:Trigonometry
Violin is a music word. It begins with the letter v.