the.com/circumference
the only number that escapes its own circle and never finishes its decimals
means the distance all the way around the edge of a circle or any rounded shape.
from From Latin 'circumferentia' — built from 'circum' (around) plus 'ferre' (to carry or bear). So the word literally describes something 'carried around,' the line that bears itself around the center. It came into English through Old French in the medieval period, when Latin was the language of geometry and learning. Its kin 'ferre' shows up everywhere: 'transfer' carries across, 'refer' carries back, 'circumference' carries around.
- pi inside
- Always circle's diameter times the never-ending pi
- earth measured
- Eratosthenes guessed it with shadows and a stick
- infinite digits
- Exact value needs pi, which never repeats
- same family
- Perimeter's rounder, smoother cousin
earth's equator — 40,075 kilometers around the widest part of our planet
great wall of china — approximately 21,196 kilometers long when measuring its perimeter/circumference
moon's circumference — 10,917 kilometers around, about 27% of earth's circumference