It seldom stands alone. But it stands alone more often than pi/2 or pi+constant. So it makes more sense to define pi than 2pi.
A= Pi * r^2 That's the first one we learned with Pi in it.
It seldom stands alone. But it stands alone more often than pi/2 or pi+constant. So it makes more sense to define pi than 2pi.
A= Pi * r^2 That's the first one we learned with Pi in it.