"The difficulty is not guessing the riddle. It is to explain the riddle" anyways, let's start.
I kind of look like a heart shape when I look at the mirror. Better than looking at a mirror while suffering an extra stroke to look like my cube.
Oh yeah that one person from ancient philosphy era, thanks for powering that theoroem but I guess if u add me one more time, I became a final theoroem to another person.
But when someone, double the size of me, stands to the left of me, WE COULD ANSWER EVERYTHING.
I hope you know who I am, because I am really awesome.