Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 281
iameter CF; draw BO and BF, 2. Z CBF is a rt. Z. 3. Also CF is the _L bisector of AB, i, .-. CB^ = CF CK. • 5. Now CF =1, BO == -, C0 = -. 2 2 6. •. cb^ = 0^ = 1 . CK = CK = CO — ko = ^ — KO. 2 . ^ 2 Q.E.F. Reasons 1. §54,15. 2. §367. 3. §142. 4. §443,11. 5. By cons. 6. §309. 7. §447. 8. §54,13.… … Given circle 0 of unit diameter, AB half the side of a reg-ular circumscribed polygon of n sides, and CB half the sideof a regular circumscribed polygon of 2 n sides; denote AB by I and CB by |. To find X in terms of s. Argument 1. Dra\r CO and AO. ^ 2. /. BOC=\Z. BOA. 3. .-. in A OAB, AC : CB = AO…
Geometry, Plane · Geometry, Solid
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