To elaborate on that, here is hiw A formats are designed : - A0 is 1 square meter - each successive A is half the area of the previous one (A1 is half A0, A2 is half A1, etc) - the ratio is around the square root of two, so that if you fold A4 in two, you get A5 (and so on)
Silaor on December 4th, 2020 at 07:04 UTC »
To elaborate on that, here is hiw A formats are designed : - A0 is 1 square meter - each successive A is half the area of the previous one (A1 is half A0, A2 is half A1, etc) - the ratio is around the square root of two, so that if you fold A4 in two, you get A5 (and so on)
crazychild0810 on December 4th, 2020 at 07:08 UTC »
Matt Parker with Paper sizes explained
Essentially: A0 = 841mm × 1189mm = 1 m2
A1 = 594mm × 841mm = 1/2 m2
A2 = 420mm × 594 mm = 1/4 m2
A3 = 297mm × 420 mm = 1/8 m2
A4 = 210 mm× 297 mm = 1/16 m2
So the A4 size seems arbitrary at first, but it is derived from A0 = 1 m2
MundaneYoghurt on December 4th, 2020 at 10:38 UTC »
Here in Chile we call them Letter(21,5×27,9 cm) and Office(21,59x33,02 cm) paper.
I never thought it was any different anywhere else in the world until I began browsing Reddit(yep, this is a common repost)