已知△ABC中,∠B-∠A=50°,∠C-∠B=35°,求∠A,∠B,∠C的度数.
更新时间:2020-10-14 10:22:10
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【知识点】 三角形内角和定理的应用解读
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解答题-证明题
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较易
(0.85)
【推荐1】如图,
、
相交于点O,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/62bd7489-3581-433a-9360-78010d97329b.png?resizew=206)
(1)求证:
;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/276f64bcfa74b44c5ef5ca88fc8208f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/62bd7489-3581-433a-9360-78010d97329b.png?resizew=206)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc59fd975a9c1a044337fb4999308588.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a70f42dccbe717bd85872938e26412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17e587b7fcc3f7ef52c0a542141daa2.png)
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解答题-问答题
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较易
(0.85)
【推荐2】已知
和
都是等腰直角三角板,按如图摆放,连接
,猜想
之间的关系并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15204b24dd62067316fee9abab2bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15204b24dd62067316fee9abab2bf73.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/5bba4f66-286e-4ebd-aacf-57bdbd1fcb1d.png?resizew=146)
您最近一年使用:0次