ln i?*fr uat,,? rr ' rA* frJc # VA T}AS TAO * HCItrcAt{ Hoc vl*T FIAM fif,,*xt/ 8t Y @"; i*st d r &U;;*4 ;Th;a,r*,,,t*i,,1{*,#,{*;, "r llha bac hoc, vat li nguoi My B I I phorangco!in (B Franklin 1706 1790) da sap x6p 64 s6 tr"r 12 d6n 75 trong nhrrng phAn giao nhau cua cac hlnh vanh khdn dd tao thanh mO cung cac con s6 vd s6 otdm la 348 CQIS B sO theo m6i bdn kinh duong tron lon nhAt ta d6u dugc 34B, nhung ngoiri B tdng kei tr6n con nhi6u b6 8 sO khac cUng co tdng la 348 Cric hinh vanh khdn, m[.]