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宁夏中考数学试?含答?- 百度文库

Դû ʱ䣺2025/6/18 5:01:06 loading ƪĵֻ
˵ݽԤݿܲȫҪĵҪݣwordʹáword΢ź:xxxxxxxQQxxxxxx ܸṩĵл֧½⡣

2?=30ʱACC1=30

ߡA=60 AMC=90 CC1AB CC1B1C1

B1C1AB ------------------4

(3) ?=45ʱB1A1ǡCBغϣC CHABH

CH=ACsin60=

3a 23g(6?2)CH2==23--------------------------------------------------------6 CM?ocos156?2411632g(6?2) =3(3?1)-------------7 SCMB=CMgB1C1?g23ga=2222

AC1C1MAMHNB60oC(A 1 )QB145oBB1C(A 1 )

4?=60ʱA1M=AC=aB1C1ֱABBCڵNQ

a tan30=RtAC11Q, C1Q?A1C1g2RtMC1N,C1M?AC11?A1M?

26?2a 2C1N?C1M?tan60=

32?23a 2111SıAMNQ?SACQ?SMCN=

111AC?CQ?CM?C1N-------------------9 11122=

16216?232?23?a?a??a?a 222222=

3253?622a?a 4432?232a------------------------------------------------------------------------------------10 2=

宁夏中考数学试?含答?- 百度文库.doc ĵWordĵصԣ㸴ơ༭ղغʹӡ
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