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 125
\ (^ tangent, and the point at which ittouches the circle is called its pointof contact. B 3. Circles are said to touch one another which meet butdo not cut one another. When each circle is without the other, as at A, they aresaid to touch externally; when one is within the other, as atthey are…
Euclid's Elements · Geometry · Mathematics, Greek
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