1、 w 2015 年 广西桂林市 中考数学 试题 12 3 36 1 3 2015 A 5 B 0 C D 3 0 0 5 0 3 C 0 2 3 2015 ABC A=50 C=70 ABD A 110 B 120 C 130 D 140 ABD= A+ C=50 +70 =120 B 3 3 7 1 A 8 B 6 C 7 D 8 7 1 =7+1=8 D w 4 3 5x x+9 A 5 B 4 C 3 D 2 1 5x 2x 3x 1 x x=2 D 5 3 A B C D C 6 3 2015 A a 5 2 =a 10B x 16 x 4 =x 4C 2a 2 +3a 2 =6a 4
2、D b 3 b 3 =2b 3 A a5 2=a10 B x16x4=x12 C 2a2+3a2=5a2 D b b3=b6 A w 7 3 28 45 28 45 28 30 53 A 28 B 30 C 45 D 53 28 3 28 A 8 3 A 30 40 50 B 7 12 13 C 5 9 12 D 3 4 6 A 30 2 +40 2 =50 2 B 7 2 +12 2 13 2 C 5 2 +9 2 12 2 D 3 2 +4 2 6 2 A 9 3 ABC AB=10 AC=8 BC=12 AD BC D E F AB AC ABC EF A D DEF A 14 B 15
3、 C 16 D 17 EF ABC AEF DEF EF DE DF AEF DEF EF ABC AB=10 AC=8 BC=12 AE=ED=5 AF=FC=4 EF=6 w DEF =5+4+6=15 B 10 3 2015 ABCD AB=6 ABD=30 ABCD A 18 B 18 C 36 D 36 ABC=60 A AE BC E BAE=30 30 AE=3 A AE BC E ABCD AB=6 ABD=30 BAE=30 AE BC AE=3 ABCD =18 B 11 3 2015 y=kx+b y 0 3 x a 0 a 3 a 0 k A 1 k 0 B 1 k 3
4、 C k 1 D k 3 w a= a 0 k 0 3 a 0 y=kx+b b=3 a= a 0 0 k C a= 12 3 2015 ABC AB=10 BD=4 BE=2 P E EA PD PD PD DPF P E A F A 8 B 10 C 3 D 5 DE FH BC H B=60 D DE AB BE BD=2 E E BDE=30 DE= BE=2 DPE FDH FH=DE=2 F BC 2 P E DEF 1 DF 1 BC P A DAF 2 F 2 Q BC Q DF 2 Q ADE DQ=AE=8 F 1 F 2 =DQ=8 P E A F 8 DE FH BC
5、H ABC B=60 D DE AB BE = BD=2 E E BDE=30 DE= BE=2 DPF w PDF=60 DP=DF EDP+ HDF=90 HDF+ DFH=90 EDP= DFH DPE FDH DPE FDH FH=DE=2 P E A F BC 2 P E DEF 1 BDF1=30 +60 =90 DF 1 BC P A DAF 2 F 2 Q BC Q DF 2 Q ADE DQ=AE=10 2=8 F 1 F 2 =DQ=8 P E A F 8 6 3 18 13 3 2015 7a 3 b 2 5 7a3b2 5 5 14 3 2015 2015 5 29 2
6、3000 23000 2.310 4 a10 n 1 |a| 10 n n a n 1 n 1 n w 23000=2.310 4 2.310 4 a10 n 1 |a| 10 n a n 15 3 2015 2 8 10 2 8 10 20 n A m A P A = 16 3 2015 Rt ABC ACB=90 AC=8 BC=6 CD AB D tan BCD A= BCD Rt ABC Rt BCD A+ B=90 BCD+ B=90 A= BCD tan BCD=tan A= = = 17 3 2015 ABCO O OC x A C 2 4 3 0 A y= BC D AD AO
7、CD 9 w k BC D D BC ABD = ABCD AOCD ABCD A C 2 4 3 0 B 5 4 A 2 4 y= k=8 y= BC y=kx+b B 5 4 C 3 0 k=2 b= 6 BC y=2x 6 D 4 2 D BC ABD = ABCD AOCD = ABCO ABD =34 34=9 9 18 3 2015 2 5 11 23 n 3 2 n 1 1 w 1 1 1 2 1 1 3 1 1 4 1 1 n n 1 1 2=3 2 1 1 1 5=3 2 2 1 1 11=3 2 3 1 1 23=3 2 4 1 1 n 3 2 n 1 1 n 1 1 8
8、66 19 6 3 0 +2sin30 +| 2| 0 =1+2 2+2 =1+1 2+2 =2 0 20 6 2015 x= 3 x = = x= 3 = 21 8 2015 ABCD E F AB CD 1 EBFD 2 AC DE BF M N ABN CDM w 1 AB CD AB=CD 2 AB CD AB=CD CDM= CFN 1 ABCD AB CD AB=CD E F AB CD BE=DF BE DF EBFD 2 EBFD DE BF CDM= CFN ABCD AB CD AB=CD BAC= DCA ABN= CFN ABN= CDM ABN CDM ABN CDM ASA
