If you squint hard enough, the capital letter pi (Π) looks like half a circle.
If you squint hard enough, the capital letter pi (Π) looks like half a circle.
What is this Cunningham’s law?
Pi is not half the circumference. It’s how many times the diameter fits into the circumference.
It is half of the circumference, multiplied by the radius, of course.
I can level up with more sources (stanford).
The circumference is 2piradius, which obviously meas half the circumference is piradius.