There are many method of geometric solution of quadratic equations (for example Carlyle Circle).
Does there exist similar method for the quintic equation?
There are many method of geometric solution of quadratic equations (for example Carlyle Circle).
Does there exist similar method for the quintic equation?
On
If you mean geometric constructions with ruler and compass, then there can't be any such methods because $5$ is not a power of $2$. This is a weaker version of the fact that the general quintic is not solvable by radicals.
For other geometric methods, see the book Geometry of the Quintic by Shurman.
None that I am aware of, but you might find references in this overflow answer helpful and interesting.