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 78
BCD, EBCF be on the same baseBC, and between the same parallels AF, BC :then shall the ^parallelogram ABCD be equal to the parallelograraEBCF. Proof. Case I. If the sides AD,DF opposite to the base BC be ter-minated at the same point D, it isplain that each of the parallelogramsis double of the…
Euclid's Elements · Geometry · Mathematics, Greek
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