Inside Out Library
Elements of geometry : containing books I to III (1886)
Smith, J. Hamblin · Toronto : W.J. Gage · leaf 136
one circle must be smaller thanthe other. Two circles air Baid to touch externally, when one point ofthe circumference of the one lies on, and no point vAthin thecircumference of the other. N.B. No restriction is placed by these defii tions on thenumber of points of contact, ind it is not till we… … Let 0 ADE touch 0 ABC internally, and let A be a point of contact.Then some point E in the Oce ADE lies within 0 ABC. Def. 7If it be possible, let 0 be the common centre of the two ©&.Join OA, and draw QEC, meeting the Oces in E and C.li 11 v 0 is the the centre of © ABC, .: OA=-OC; I. Def. 13.…Geometry
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