SADI Muslihuddin Abumuhammad Abdulloh ibni Mushrifuddin (1203/8, Sheroz—1292, hamon jo), shoir, nasrnavis va mutafakkiri fors-tojik. …
Mufassal »RADIUSi davra
RADIUSi davra yo sfera (lotini radius, aynan — simi charkh, shuo), porchaest, ki nuqtai dilkhohi davra (yo sfera)-ro bo markazash mepayvandad. Darozii in porcharo niz Radius menomand.
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