Question 1

What is the difference between circumference and diameter?

Accepted Answer

The diameter is the distance across the circle through the center. The circumference is the distance around the circle. C = πd = 2πr.

Question 2

How is pi (π) defined?

Accepted Answer

Pi is the ratio of any circle’s circumference to its diameter. It is an irrational number approximately equal to 3.14159.

Circumference

数学