挑战习题
1
/5
单选题
难度:
1.1.如图,△ACB≌△A′CB′,∠BCB′=30°,则∠ACA′的度数为( )
A
20°
B
30°
C
35°
D
40°
提示1:
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正确答案:
Qg==
6Kej562U77ya4oi14pazQUNC4omM4pazQeKAskNC4oCy77yMPGJyPuKItOKIoEFDQj3iiKBB4oCyQ0LigLLvvIw8YnI+5Y2z4oigQUNB4oCyK+KIoEHigLJDQj3iiKBC4oCyQ0Ir4oigQeKAskNC77yMPGJyPuKItOKIoEFDQeKAsj3iiKBC4oCyQ0LvvIw8YnI+5Y+I4oigQuKAskNCPTMwwrA8YnI+4oi04oigQUNB4oCyPTMwwrDvvI48YnI+5pWF6YCJ77yaQu+8jg==
2
/5
单选题
难度:
2.2.如图△ABC≌△DEF BE=4,AE=1,则DE的长是( )
A
5
B
4
C
3
D
2
提示1:
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提示2:
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正确答案:
QQ==
6Kej562U77ya4oi14pazQUJD4omM4pazREVGPGJyPuKItERFPUFCPGJyPuKItUJFPTTvvIxBRT0xPGJyPuKItERFPUFCPUJFK0FFPTQrMT01PGJyPuaVhemAiUHvvI4=
3
/5
单选题
难度:
3.4.如图,△ADB≌△ECB,若∠CBD=40°,BD⊥EC,则∠D的度数为
A
30°
B
45°
C
50°
D
40°
提示1:
5LiJ6KeS5b2i5YWo562J5a+55bqU6KeS55u4562J
提示2:
55u06KeS5LiJ6KeS5b2i5Lik6ZSQ6KeS5LqS5L2Z
正确答案:
Qw==
6Kej562U77ya4oi14oigQ0JEPTQwwrDvvIxCROKKpUVD77yMPGJyPuKItOKIoEM9OTDCsC3iiKBDQkQ9OTDCsC00MMKwPTUwwrDvvIw8YnI+4oi14pazQURC4omM4pazRUNC77yMPGJyPuKItOKIoEQ94oigQz01MMKw77yOPGJyPuaVheetlOahiOS4uu+8mkPvvI4=
4
/5
单选题
难度:
4.3.如图,在△ABC中,D、E分别是边AC、BC上的点,若△ADB≌△EDB≌△EDC,则∠C的度数为( )
A
15°
B
20°
C
25°
D
30°
提示1:
5YWo562J5LiJ6KeS5b2i5a+55bqU6KeS55u4562J
提示2:
4oigQT3iiKBCRUQ94oigQ0VE77yM4oigQUJEPeKIoEVCRD3iiKBD
提示3:
4oigQkVEK+KIoENFRD0xODDCsO+8jOWPr+S7peW+l+WIsOKIoEE94oigQkVEPeKIoENFRD05MMKw
提示4:
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正确答案:
RA==
6Kej562U77ya4oi14pazQURC4omM4pazRURC4omM4pazRURDPGJyPuKItOKIoEE94oigQkVEPeKIoENFRO+8jOKIoEFCRD3iiKBFQkQ94oigQzxicj7iiLXiiKBCRUQr4oigQ0VEPTE4MMKwPGJyPuKItOKIoEE94oigQkVEPeKIoENFRD05MMKwPGJyPuWcqOKWs0FCQ+S4re+8jOKIoEMrMuKIoEMrOTDCsD0xODDCsDxicj7iiLTiiKBDPTMwwrA8YnI+5pWF6YCJRO+8jg==
5
/5
单选题
难度:
5.5.如图,已知点D在AC上,点B在AE上,△ABC≌△DBE,且∠BDA=∠A,若∠A:∠C=5:3,则∠DBC=( )
A
30°
B
25°
C
20°
D
15°
提示1:
5YWo562J5LiJ6KeS5b2i5a+55bqU6KeS55u4562J
提示2:
4oigQkRFPeKIoEE94oigQkRB77yM4oigRT3iiKBD
提示3:
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提示4:
5Zyo4pazQUJE5Lit5qC55o2u5YaF6KeS5ZKM5a6a55CG5rGC6Kej
正确答案:
Qw==
6Kej562U77ya55Sx4pazQUJD4omM4pazREJF77yMPGJyPuKItOKIoEJERT3iiKBBPeKIoEJEQe+8jOKIoEU94oigQ++8jDxicj7iiLXiiKBB77ya4oigQz0177yaM++8jDxicj7iiLTiiKBB77ya4oigQkRB77ya4oigQkRF77ya4oigRT0177yaNe+8mjXvvJoz77yMPGJyPuWPiOKIoEEr4oigQkRBK+KIoEJERSviiKBFPTE4MMKw77yMPGJyPuKItOKIoEM94oigRT0zMMKw77yM4oigQkRFPeKIoEE94oigQkRBPTUwwrDvvIziiKBDREU94oigQSviiKBFPTUwwrArMzDCsD04MMKw77yMPGJyPuKItOKIoERCQz0xODDCsC3iiKBDLeKIoENERS3iiKBCREU9MTgwwrAtMzDCsC04MMKwLTUwwrA9MjDCsO+8jjxicj7mlYXpgIlD77yO