Exercises on Euclid and in modern geometry for the use of schools, private students, and junior university students (1881)
McDowell, James L · Cambridge, Deighton, Bell, and Co. · leaf 67
BG, or are in the samesegment BACG (III. 21), therefore theangles OCD and DCG are equal, and sincethe angles at D are right, and the side DCcommon to the two triangles ODC, DCG ;therefore OD and DG are equal (I. 26).Therefore the rectangle AD . DO equals the rectangle AD. DG,which equals BD. DC… … 63.] AND IN MODERN GEOMETRY. 39 Let the triangles ABC, DEF be upon equal bases BC, EF A D
Geometry
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