maTematika 7

amoxsnebi, miTiTebebi:C1. samkuTxedebi tolia ori gverdiTi da maT Sorismdebare kuTxiT.BOE2. ∆ACB = ∆AEDAE=ABAC=AD∠A saerToa, e.i. DE=BC.ACEADB3. a) AC=A 1C 1; b) ∠B=∠B 1.AO4. OB=DO= kCODBSemoviRoT aRniSvnebi AO=kx, OB=x, DO=ky, CO=y,AB = ( k + 1)xmaSin ) , magram AB=DC, e.i. x=y, AO=DO daDC = ( k + 1)yCO=OB, samkuTxedebi tolia I niSnis Tanxmad.AOC5. ∆ACO=∆DBO I niSnis Tanaxmad da BD=AC=6,2.6.BB 1AMCA 1 M1C 1moc.: ∆ABC; ∆A 1B 1C 1AC=A 1C 1AM=MC; A 1M 1=M 1C 1; BM=B 1M 1∠BMC=∠B 1M 1C 1u.d. ∆ABC= ∆A 1B 1C 1ganvixiloT ∆BMC da ∆B 1M 1C 1tBM = B1M1uAC A1C1MC = = = M C u1 1 & OBMC= OB M C2 2+ BMC = + B1M1Cu1v1 1 1e.i. ∠C= ∠C 1da BC= B 1C 1e.i. ∆ABC= ∆A 1B 1C 1samk. tol. I niSnisTanaxmad.91masc_cigni_VII_kl_cor.indd 91 03.07.2012 15:46:55