# Can't you form a ring from almost any number of sides from carbon?

Recently, we have been learning Chemistry in my physics class at school. We learned that Carbon is one of the elements that has the most variety in the compounds it can formed, being able to form four covalent bonds. This got me thinking- I know you can form Carbon into hexagonal rings- graphite does this- but shouldn't you be able to form almost any kind of polygon from carbon, with each one double bonded to the two next to it?

Carbon bonds have certain preferred angles. For example, the tetrahedrally symmetrical methane, which has sp3 hybridization,, $\ce{CH4}$, has an angle of 109.5 0. In benzene, where there is sp2 hybridization, the angle is 120 0.