2020年中考数学《三轮复习》培优训练: 《图形平移?全国通用)(解析? - 百度文库

BE10x ͬBF10x ࣨ10x?10x24 x105x10+5x105

2ıAACCΣ

߾ABCDBDƽƺABCD䣬 AACC䣬AA䣽CC䣮 ıAACCƽıΣ ABAB䣬ABAB䣬 ıABBAƽıΣ BB䣽AA䣮

൱BB䣽10ʱAA䣽AC10ʱıAACCΣ

10⣬ȥ ʱصֵΪ24cm2

9⣺

1ͼ٣1֣

ABB1A1ƽıΣ2֣

£ߡA1B1C1ǡABCƽƺã

A1B1ABA1B1AB ABB1A1ƽıΣ3֣

2ͼڣƽ4ABB2A2Σ4֣ BA2ACO㣬 ABB2A2Σ

AB2BA2AOB2OAC2BOA2O RtBOB222УB2O+BOBB22 BO24222 BO2

ԽBA22BO46֣

3ͼۣƽ2ʱACA3B3ܻƽ֣ʱıAB3CA3ǾΣ֣ £

BB3B3CBC2 AB3ǵȱߡABCߣ AB3B3C AB3C90㣮

֡AA3B3CAA3B3C2 AB3CA3ƽıΣ AB3CA3ǾΣ9֣

10⣺1١A1B1C1ͼʾA104B120C131 ⣺a22a3+25b2b5+1 a1b3 ba22ƽΪ

6

2Qm0

⣺?|m1|120241533 m

0

Q0

11⣺1ߵAΪ12BΪ52

ͼʾΪֱϵ 2ϵ֪ CΪ25 ʴΪ25

3ѡABCƽ6λõӦġA1B1C1 ٽA1B1C1yᷭA2B2C2 ͼΪϵлġA2B2C2

ڵPmnǡABCһ㣬

P2ǡA2B2C2PӦĵ㣬

P2Ϊmn6 ʴΪmn6 ۸ݶԳԿ֪

yһQʹõQA2C2ľ֮С A2C1yڵQʱQA2+QC2ij֮С ΪA2C1ijA2C13

QA2+QC2ij֮СֵΪ3ʴΪ3

12⣺1ͼ٣MNΪ

2ͼڣABGΪ

SABG342412234

13⣺1y

x1 y3

PΪ13

2AƶCC0aBƶDʱD2a3 ͼ1PDֱyxƽߣ߽MDMyN

+

+3

ϵͷ779662525#qq.com(#滻Ϊ@) ICP20003344-4