本课配套习题挑战模式1/5
已知:在△ABC中,∠A=36°,AC=BC,则∠ACB的度数为( )
A: 90° |
B: 100° |
C: 108° |
D: 120° |
- 提示1:PHA+562J6IWw5LiJ6KeS5b2i5oCn6LSoPC9wPg==
- 提示2:PHA+5LiJ6KeS5b2i5YaF6KeS5ZKMPC9wPg==
- 答案:Qw==
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本课配套习题挑战模式2/5
在等腰△ABC中,AB=AC,D是AC上一点,且AD=BD=BC,则△ABC各角的度数为( ).
A: ∠A=36°,∠ABC=72°,∠C=72° |
B: ∠A=90°,∠ABC=45°,∠C=45° |
C: ∠A=50°,∠ABC=65°,∠C=65° |
D: ∠A=40°,∠ABC=70°,∠C=70° |
- 提示1:PHA+4oigQT3iiKBBQkTvvIziiKBDPeKIoEFCQz3iiKBDREI8L3A+
- 提示2:PHA+6K6+4oigQT14wrDvvIziiKBDPeKIoEFCQz3iiKBDREI9MnjCsO+8jOW6lOeUqOaWueeoi+axguinozwvcD4=
- 答案:QQ==
PGRpdj7op6PvvJriiLVBQj1BQ++8jEFEPUJEPUJD77yMPGJyPuKItOKIoEE94oigQUJE77yM4oigQz3iiKBBQkM94oigQ0RC77yMPGJyPuiuvuKIoEE9eMKw77yM5YiZ4oigQUJEPeKIoEE9eMKw77yMPGJyPuKItOKIoEM94oigQUJDPeKIoENEQj3iiKBBK+KIoEFCRD0yeMKwPGJyPuKIteKIoEEr4oigQyviiKBBQkM9MTgwwrDvvIw8YnI+4oi0eCsyeCsyeD0xODDvvIw8YnI+4oi0eD0zNu+8jDxicj7iiLTiiKBBPTM2wrDvvIziiKBBQkM94oigQz03MsKwLjwvZGl2Pg==
本课配套习题挑战模式3/5
在等腰△ABC中,AB=AC,D是AC上一点,且AD=BD=BC,则∠BDC的度数为 ( )
A: 36° |
B: 72° |
C: 108° |
D: 60° |
- 提示1:PHA+QUI9QUPvvIziiKBDPeKIoEFCQzwvcD4=
- 提示2:PHA+QUQ9QkQ9QkPvvIziiKBBPeKIoEFCRO+8jOKIoEM94oigQkRDPTLiiKBB77yMPC9wPg==
- 提示3:PHA+5bqU55So5YaF6KeS5ZKM5rGC5bqm5pWwPC9wPg==
- 答案:Qg==
PGRpdj7op6PvvJriiLVBQj1BQ++8jOKItOKIoEM94oigQUJD77yMPGJyPuKItUFEPUJEPUJD77yM4oi04oigQT3iiKBBQkTvvIziiKBDPeKIoEJEQz0y4oigQe+8jDxicj7iiLXkuInop5LlvaLlhoXop5LlkozkuLoxODDCsDxicj7iiLTiiKBBPTM2wrA8YnI+4oigQkRDPTLiiKBBPTcywrA8YnI+5pWF6YCJQi48L2Rpdj4=
本课配套习题挑战模式4/5
如图,在△ABC中,AB=AC,D为BC的中点,E为AC边上一点,且有AE=AD,∠EDC=18°,则∠B的度数是( )
A: 36° |
B: 46° |
C: 54° |
D: 72° |
- 提示1:PHA+5qC55o2u6L205a+556ew55qE5oCn6LSo5Y+v5b6X5Ye64oigQURFPeKIoEFFRD3iiKBDK+KIoEVEQzwvcD4=
- 提示2:PHA+55Sx4oigRURDPTE4wrDlj6/lvpflh7riiKBCPeKIoEPnmoTluqbmlbA8L3A+
- 答案:Qw==
PGRpdj7op6PvvJrmoLnmja7ovbTlr7nnp7DnmoTmgKfotKjlvpfvvJriiKBCPeKIoEPvvIziiKBBREM9OTDCsDxicj7lj4jiiKBBREM9OTDCsD3iiKBBREUr4oigRURDPeKIoEFFRCviiKBFREM8YnI+4oi05Y+v5b6X4oigQUVEPTcywrA8YnI+5qC55o2u5aSW6KeS5a6a55CG4oigREVBPeKIoEMr4oigRURD77yM5Y+v5b6X4oigQz01NMKwPeKIoEI8YnI+5pWF6YCJQy48L2Rpdj4=
本课配套习题挑战模式5/5
已知等腰△ABC中,AB=AC,D为BC边上一点,连接AD,若△ACD与△ABD都是等腰三角形,则∠B的度数是()
A: 45°或60° |
B: 45°或36° |
C: 50°或36° |
D: 60°或36° |
- 提示1:PHA+5a+55Zu+5b2i6L+b6KGM5YiG57G76K6o6K66PC9wPg==
- 答案:Qg==
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