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1. 若$\triangle ABC \cong \triangle DEF$,点$A和点D$,点$B和点E$是对应点. 如果$AB = 7\ \text{cm}$,$BC = 6\ \text{cm}$,$AC = 5\ \text{cm}$,则$EF$的长为()
A.$4\ \text{cm}$
B.$5\ \text{cm}$
C.$6\ \text{cm}$
D.$7\ \text{cm}$
A.$4\ \text{cm}$
B.$5\ \text{cm}$
C.$6\ \text{cm}$
D.$7\ \text{cm}$
答案
C
2. 如图,$\triangle ABC \cong \triangle ADE$,$D在BC$边上,$\angle E = 55^{\circ}$,$\angle DAC = 30^{\circ}$,则$\angle BDA$的度数为()
A.$55^{\circ}$
B.$65^{\circ}$
C.$75^{\circ}$
D.$85^{\circ}$
A.$55^{\circ}$
B.$65^{\circ}$
C.$75^{\circ}$
D.$85^{\circ}$
答案
D
3. 如图,$\triangle DBC \cong \triangle ECB$,且$BE与CD相交于点A$,下列结论错误的是()
A. $BE = CD$
B. $AB = AC$
C. $\angle D = \angle E$
D. $BD = AE$
A. $BE = CD$
B. $AB = AC$
C. $\angle D = \angle E$
D. $BD = AE$
答案
D
4. 如图,$\triangle ABC \cong \triangle FDE$,$AF = 20$,$EC = 12$,则$AC$等于()
A.$14$
B.$15$
C.$16$
D.$17$
A.$14$
B.$15$
C.$16$
D.$17$
答案
C
5. 如图,已知$\triangle ABC \cong \triangle AB'C'$,且$AC' // BC$,若$\angle BAC = 80^{\circ}$,$\angle C' = 68^{\circ}$,则$\angle B'AC$的度数为()
A.$32^{\circ}$
B.$20^{\circ}$
C.$15^{\circ}$
D.$12^{\circ}$
A.$32^{\circ}$
B.$20^{\circ}$
C.$15^{\circ}$
D.$12^{\circ}$
答案
D
