I need to look into ie9's support for CSS transforms, but if it supports that it should work. It definitely took me back to my high school days of 3d hacking :)
EDIT: Currently, it also needs to support linear-gradient background images because that's how I draw a triangle with a div. I don't think IE9 supports that unfortunately.
EDIT: Currently, it also needs to support linear-gradient background images because that's how I draw a triangle with a div. I don't think IE9 supports that unfortunately.