Jan 01, 2016
,,.:? : :AOC,ABC?,. 1 2.
AOB
DD
1
1 1 OC(AOBACB) ABAOB ACB
1 DE(ADBAEB) AB ACB ADB
1. B,D,E,ACABC,ADC,AEC.
: , ABO,CO(A,B),:ACB?,?:ACB,.:O ,DAOBACB ACB AOB18090
: , ABO,CO(A,B),:ACB?,?:ACB,.:O ,OA=OC=OB OCA = A, OCB= BA+ B+ ACB=1802 OCA+2 OCB=180 ACB= OCA+ OCB=90:,90(),90.:O ,AB,ACB=90,O ,ACB=90,ABO .
1.4_____________2. OBAC=32BOC=____
3.OACB = 130AOB=______
361446410023
11OCDC = DACB =90
3ACB =90
ABCDOABCDAC BD
4.,ABC,AB=AC,ABBCD,ACE.:BD=DE.5.ABC,ODAC,ABBCD,ACE.:BD=DE. 6.P49 9
7. 900 A.1 B.2 C.3 D.4ABCDEA+B+C+D+E A.1800 B.1500 C.1350 D.1200
9.,AB,O,C,EAC,OEACD,AC=8,DE=2,BC.