|≈||approximately equal to|
|digits||indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …)|
cord is a unit of area it equal ≡ 1.48644864 m2 ≡ 192 bd.
A square inch (plural: square inches) is a unit of area, equal to the area of a square with sides of one inch.