解答题-证明题 适中0.65 引用1 组卷271
已知AB//CD,H为AB、CD之间一点,E为直线CD上点C左边一点;
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724480500957184/2790450288508928/STEM/80fd0d91-c480-4ff9-914a-787bde8a80ac.png)
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724480500957184/2790450288508928/STEM/20c53bf5-c573-4d89-8e34-eb2cb69971d7.png)
(1)如图1所示,HF平分∠GHC,∠F=∠CHF,∠AHG=∠FCE,求证:∠A=2∠FCE;
(2)如图2所示,∠AHG:∠GHF:∠FHC=1:2:3,CF平分∠HCE,∠F=64°,求∠A的度数.
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724480500957184/2790450288508928/STEM/80fd0d91-c480-4ff9-914a-787bde8a80ac.png)
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724480500957184/2790450288508928/STEM/20c53bf5-c573-4d89-8e34-eb2cb69971d7.png)
(1)如图1所示,HF平分∠GHC,∠F=∠CHF,∠AHG=∠FCE,求证:∠A=2∠FCE;
(2)如图2所示,∠AHG:∠GHF:∠FHC=1:2:3,CF平分∠HCE,∠F=64°,求∠A的度数.
20-21七年级下·重庆九龙坡·期中
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