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BaD0x4xcA1

B

C

DmmAm

Bmm1

Dm2ynxyx4xyxA

B2xCx

D2

x2xbeq\o\ac(△,Rt)90BCACbBDA

BAD

C

DCD520172xA1+x%＝3000Cx3000

Bx3000D10001300045A

xx1

B

xx+145Cx1

Dxx

22222222221222222222222222212222223xxmm0ABCA7BCD1011MaNaaMNAMNBMND10x02A3B2D6+4x112ab+428ab13

xx+a1aa15xmxx+10m16

x0x+91718*a*ba①

*

2②+*b*a③x*+1④x*11191xx+8022+4x60

x2010mm21x1xkx01k

222222212222222112222202b01ax+bx

23120192021215.464124①80

②cm25xx2mx+01m2x+x56m26x2x+2kx+1230

22227

②4+10y+2+5+y5③①③23+yy1①x12xy+4y+

222232221222222222222223222122222222222a

xx+2

2

40c1+1mxx+1﹣mm0yy3x3x

x4x2x2x2xbeq\o\ac(△,Rt)ACBBCbBDADb

2

x

b0a+400AD201910001+C

212222212212222212x45xx145x3m+1m0m6x7x+120xx4①43②3410ABC10DMa1NaaaNMMN10

1311+412axxx201680xx10x

222221212222222221212222222+11134xxx2x2x214x+a①b4ac1144a+1a21a②x+x1xa1a1aa115xx2+l0m2x+l0244m4+12m33m316xmx

x036m0m1xmx4m5016m+200m

222212222222222222121212222222222212222222222222121212222222222121m0mxx1mxx+9x+6331x6+90xm117x+4x+4x

18

*

①+0a*bb*a②x*x+1+2+2+1③x*1+3

xxx+6x+31x+61x+5x0x④①④1924x20x420x30xxx220m100m5m5m5+202121x

k

x1kk10k+2k2k

2222122122222222222122122222221k2k23x+4x10

22xx2x2+1xx1x

xx

2+1023x1+x

14.4x2.220%290%+90%+y90%+90%+90%+15.464y2248060x60xx1500+82502xxxx150070+8252522x00[]012

2121222222121212222221121221221222x+2xxx+m2+16x+1656m2m1m226k22kk23x+20k3kk0kkx+0xx27②x6+233xy+2y19③①