1.2
1、.
2、(1) 平行移动,≌,AB和DE、BC和
EF、AC和DF;
(2) 30°,≌,∠E与∠C、∠D与∠B、 ∠EAD与∠CAB.
3、AB = BA,BC = AD, BD = AC, ∠D = ∠C, ∠DAB = ∠CBA, ∠ABD = ∠BAC.
4、
KP = DF = 7 cm, PQ = DE = 5 cm, QK cm, EK = 3 cm.
5、(1) 50°; (2) 90°.
1.3.1
1、△ACB ≌ NMR,△DEF ≌ △QOP.
2、在△ABC和△CDA中,
∵AB = CD, ∠BAC= ∠DCA,
AC = CA,
∴△ABC ≌ △CDA(SAS).
3、∵AB ⊥ CD,∠ABC = ∠DBE = 90°.又 AB = DB,BC = BE,
∴△ABC ≌△DBE(SAS).
4、(1) ∵AD = AE, ∠1 = ∠2, AO = AO, ∴△AOD ≌ △AOE( SAS).