.. 05 A. B. C. D. D. 05 RtABC AB=9BC=6 B=90 0 ABC A BC D MN BN A M N C D B A 3 5 C B 5 C 4 D 5 3. 05,,. A B C D C 4 05 3 ABCD BAD=BEF BCCD AEACAF ABE A B C 3 D 4 C 5.05 ABC ABC AB AB AC AC ABC ABC A A B B
ABC ABC. ( ) A C D B D 6(05? ) ABC A BC A B A B A C A C A BC A BC A A B B A BC A BC. ( ) A C B D D 7(05? ) Rt ABC A 90BD ABC AC D AB 4, BD 5 D BC A 3 4 5 6 A B D. (05 ) ABCD AC EF. A=60 AD=4AB=6 AE C 9 : 4.. 05
DAE=90 AD=AE BAC=90 BAC=DAĖ BAC- DAC=DAĒDAC BAD=CAE 4 AB=AC ABD ACE BD=CE. 6 05 3 AFCD B E AD ABDE A DAFDC BCEF B A F C D E ABC DEF ACB=DFE BCEF 3. (05 ) EBC AB=ECABCDBC=CD AC=ED
ABCD B=DCĖ ABC ECD 4. 05 BCE ACDEACCE ACD B. ABC CDE A D B C E 0 ACDE ACD D BCA E ACD B ACCE B D ABC CDE 5 05? 4 D ABC AB CNAB DN AC MMA=MC CD=AN AMD =MCD ADCN 0 CNAB DAC=NCA AMD CMN MA DAC AMD MC NCA CMN AMD CMN ASA AD=CN AD CN ADCN 4 CD=AN 5 ADCN AMD =MCD AMD MCD = +MDC
MCD =MDC MD =MC ADCN MD =MN=MA=MC AC=DN 4 ADCN 5 6 05?? ABCD EF BC CD AE = AF A D BE = DF ACEFO OC M OM = OA O EMFM AEMF B E C 8 ABCD ABAD, B = D = 90 F M AE = AF Rt ABE Rt ADF BEDF 4 AEMF ABCD BCA = DCA = 45 BC = DC BEDF BCBE= DCDF. CE CF OE OF OM = OA AEMF AE = AF AEMF 8 7.05?? 3 4 ABCD P AD A D B P C G PG DC H EF BPBH APB=BPH AP+HC =PH 3 AP= PH PE =BE EPB=EBP EPH=EBC=90 EPH- EPB=EBC- EBP BPH=PBC ABCD ADBC APB=PBC APB=BPH----------------------4 4B BQPH Q APB=BPH 3 ABPQBP A BP APB BP BQP BPH 90 ABP QBPAAS AP=QPBA=BQ AB=BC BC=BQ C=BQH=90 BCH BQH Rt BCHRt BQH 4
:z~zstep 8. BC BQ Rt BCHRt BQHHL BH BH AP+HC=PH ---------------------------8 3 AP=PQ= PD=3 QH=HC=x DH=4- x Rt PDH +DH =PH 3 +4- x =x+ x=.4 PH=3.4 --------------------------- 05 ABCD AD BC ADB BCA 80 ABCD ABE ABCD ABD BAC AEB 3 ABE ABCD ABD BAC AEB 3 ABE AE EAB EBA ABCD AD A B B A ABD BAC ( SAS) ADB BCA ADB BCA 80 ADB BCA 90 ABE BAC EAB EBA 80 AEB 90 AEB ABD 90 EAB 90 (90 AEB ) AEB AEB
ABD BAC AEB AB BD AC GF ABCD AD BC ADB BCA 80 ADB ADG 80 BCA ADG AG BD, BF AC AGD BFC 90 AGD BFC ( AAS) AG BF AB BA ABG BAF ( HL ) ABD BAC ADB BCA 80 EDB ECA 80 AEB DHC 80 DHC BHC 80 AEB BHC BHC BAC ABD ABD BAC ABD BAC AEB 9 05 8 RtABC C90 DEFG D AC EF AB G BC ADE BGF DEFG 6 AC
AC=6 0. ( 05 ) 7 ABC D BC EF AD CEBF BECF. BDF CDE DE= BC BFCE. CEBF @&* :^ CED =BFD... D BC BD =DC...3 BDF CDE BDF CDE AAS...5 BFCE...7 05 ABC CA = CB ACB = 90 DE BC CD = BE C CMAEAEM AB F DF AE N AC = CD = CM D =E
CD=BE,CD= BE= AC=CB= CE=CB+BE=3 Rt ACE AE AC EC 3 3 CEAE S VCB AC CE 3 3 CM 6 6 3 CM = = 4 3 3 AE CM B BHCB CM H ABC CMA 90 CAM ACM 90 ACM ECM 90 CAM ECM BHCB CBH 0 90 CAE ACE CBH AC BC ACE ACE CBH ( ASA) BCH CBH
c%om] CE BH E H 7 0 ABC CBF 45 0 CBH 90 FBH 45 FBH CBF DB DBF HBF ( SAS) HB DBF HBF DBF HBF BF BF D H E 0 05 ABC ACBC ACB90 DAB E AB BF CE F CD G AECG DAB ACBC ACB90 CDAB ACD BCD45 CAD CBD45 CAE BCG BFCE CBG BCF90 ACE BCF90 ACE CBG AEC CGB CAE BCGACBC ACE CBG[w&@ww.^zzste~p. AEC CGBASA AECG
3.(05? ) A 0 OA AOB C x OC BC CBD DA y E OBC ABD C E E OBC ABD AOB CBD OBC ABD AOB CBD OB=AB OBA=OAB=60 BC=BD CBD=60 OBA+ABC=CBD+ABC OBC=ABD OBC ABD { OB=ABOBC=ABDBC=BD OBC ABDSAS 5 OAE=60 30 AE= E OBC ABD BAD=BOC=60 OAB=60 OAE=80- OAB- BAD=60 Rt OEA AE=OA= OE=3 E E E0 3. 4(05 )( 8 ) ( ). ABCD ABCD.
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