The range for a amongst the possible choices is about 35 km, but for small scale (large region) applications this variation may be ignored, and mean values of 6,371 km and 40,030 km may be taken for the radius and circumference respectively.
Etartar daɣ wi ilănen nefran hullăn eha 35 n kilometir mušăm i aɣan andărrăn (rejion maqqorat) n aplikăsyon tan amutti wen addobăt a hin ettăwad in tolas ewăd tichiten n 6371 n kilometir d 40.030 n kilometir addobat ad immukăs daɣ radius d taɣălalwăyt n iyyan fuk