^6o EyuAKoecKaeo Onpedmjteme 



3aMtmHM'B, ^mo maKoe pasAoateHie mpeyrojiBHHKa cnpaBe^iHBO moAb ko 

 moMi. CAynat, Kor^a r nente pa^iyca Kpyra, BmicaHHaro Bt mpeyroAL- 



HnK:b ABC. CAt^OBamcABHO, mh npe^nojiaracMi. r <Cy^* BnpoHeMT», mo^rho 



ne ncKAioqarnB cAyqaii r — -^^j mor^a Ha^oÔHo mojiBKO npnHamB i2 n^O. 



Ilpe^i^e He;RejiH sauMeMca ptuicHieMi» Bonpoca, BHnmueM'b ^ak y^o6- 

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 Bomb OHt (no ^epine;Ry iMy): 



ÂB — L,7bz=zL — 2y{Z).r,bH=2r 



Sin. 30° Cos. 60° =z i, 60° =: Cos. 30° =z 



a 



HycmB Gy^emb P micmmeAb ^poSn (1); omnomeHie — ~ 



271. — X* 



— ~ n3o6pa3Hm'b BtpoamHocmB Bcmp'feqn i^HAnn^pa no KpafiHeii aitpt 

 CB o^HOK) ÏÏ31» cniopoHi. mpcyrojiBHHKa. 



npncmynHM'b menepB k-b onpe^tJieHiio BeAn^HBi P , h aaMtmiiM'b 

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 £2, mo caMHÎi niunn^pt ne Moatemb na/(amb hu na o^ny nsb cmopoRb 

 BC, CA. Cji*<^oBaineABHO, ^aa njion^a/iii i2 ne Gy^eniTb cjiy^aeBb 

 Bcmptiii. nsoSpasHM-B ^peat m ihcao cAy^aeBi», Bb KomopHXï. i^njuiH^pb, 

 na^afl neHmpoM'B CBOiiMb BHympn njioma^H «7, nepect^emb Komopyio nn- 

 6y^B H3I. cmopoHi» AB, BC, CA, a ipeai» n rao me caMoe bi. pascym^e- 

 mvL Kaffi^^oii «3* nAoïi^a/ieli a). Yloxy^ixwh P — Zm ~\- 5n, h cjit^OBamejiBHO, 

 HCKOMaa BtpbflrnHocmB, Komopyio u3o6pa3HM'B Hpeai» z, onpe^^tAjimcfl «top- 



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