U R A Q T Pi
cirCUMference = 2 x Pi x radius
radius x radiu..
Added 2021-03-14 22:38:30 +0000 UTC
U R A Q T Pi
cirCUMference = 2 x Pi x radius
radius x radius = diameter
Pi is a mathematical constant when diameter to circumference ratio
3.14159... infinite number sequence
i don't own these images. visual demonstration taken from the internet :D