In technical drawing the most common formats are from the International Standar (ISO) ‘A’ Series.
A0 is the biggest format with and area of 1 square m
A1 is half of the size of A0 , A2 is half of the size of A1 and so on
A4 the usual paper we use is 21,0 cm * 29,7 cm
A0 is the biggest one and A8 is the smallest one. (A 0)
Matt Parker es un divulgador matemático conocido por sus libros como things to do in the fourth dimension‘