如图为利用尺规作一个角等于已知角的作图过程,下面说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/21/eba42813-5ca5-487f-8ace-213351b5e32b.png?resizew=133)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/21/1b78d930-784c-4ea6-8d7e-e43e92aba32d.png?resizew=136)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
更新时间:2023-08-16 14:12:23
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【知识点】 尺规作一个角等于已知角解读
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【推荐1】如图,在
中,
,按如下步骤操作:①以点A为圆心,任意长为半径作弧,分别交
,
于D,E两点;②以点C为圆心,
长为半径作弧,交
的延长线于点F;③以点F为圆心,
长为半径作弧,交②中所画的弧于点G;④作射线
,若
,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9463cdd7f187734678e4fb53d73b2865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da2df99feb5725885b875409085d640f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04dc5504eecf40b7f1bf1e7e67cf5d85.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/30/7b7ccd8d-702f-4ff3-a54a-9747a78350b9.png?resizew=188)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在△
中,
,
为钝角.按下列步骤作图:①以点B为圆心,适当长为半径作圆弧,交BC于点D,交AB于点E;②以点
为圆心,
长为半径作圆弧,交
于点
;③以点
为圆心,
长为半径作圆弧,交②中所作的圆弧于点
;④作射线
交
于点
.下列说法不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/e94e02fd-85d2-47c4-ab39-eb2f2b76f491.png?resizew=171)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e95be88bc79b3c7e72d349c4cb3c88d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/e94e02fd-85d2-47c4-ab39-eb2f2b76f491.png?resizew=171)
A.![]() ![]() | B.![]() |
C.∠CHB=∠A+∠B | D.![]() |
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