The elements of Euclid for the use of schools and colleges : books I., II., III. (1876)
Todhunter, I. (Isaac), 1820-1884 · Toronto : Copp, Clark · leaf 89
84 EUCLIUS ELEMENTS. PROPOSITION 12. THEOREM. If two circles touch one nyiother externally, the straightline which joins their centres shall pass through the pointof contact. Let the two circles ABC, ADE touch one another ex-ternally at the point A\ and let F lie the centre of thecircle ABC, and G…
Geometry · Euclid's Elements · Mathematics, Greek
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