The elements of Euclid for the use of schools and colleges; comprising the first six books and portions of the eleventh and twelfth books; (1903)
Euclid, Todhunter, I. (Isaac), 1820-1884, ed. edt, Simson, Robert, 1687-1768, ed. edt · London; New York, Macmillan · leaf 287
les, angles, whether at the centres or at the circumfer-ences, have the same ratio which the .arcs on which they stand have toone another ; so also have the sectors. Let ABO and DEF be equal circles, and let BGC and EHFbe angles at their centres, and BAG and EDF angles at theircircumferences: then…
Euclid's Elements · Geometry · Mathematics, Greek
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