Would Math be different on another planet?

So, if u google why a circle has 360 degrees, the quick answer is that it takes about 360 days to do 1 revolution around the sun. So, on venus for example, would the circle degrees by different? or rather should we change the time or use Earth time?

Mayan 2012 - Yellowstone connection?

Mayan 2012 - is it YellowStone MegaVolcano? Geologist say it's 600,000 cycles is overdue (by 4,000 years). Won't end the earth, just change it like dinosaurs/mammals.