在
中,
,
,用无刻度的直尺和圆规在
边上找一点
,使
平分
,下列做法不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746eb682b6da9860cc998ad50372a343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f10681704c4fccfd37664eaf34391dd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-09-11 10:32:02
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【推荐1】如图,作一个
,使
,以下是打乱的作图步骤:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/1/9cd90569-87da-44e0-a931-ec143726fd1e.png?resizew=146)
正确操作步骤的顺序是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d73e9728ffc83c9373be79f1b9537f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3002753a7f65303c922dfe52be2d4e5.png)
①以点O为圆心,适当长为半径画弧,分别交OA,OB于点![]() ![]() ②分别以点 ![]() ![]() ![]() ![]() ③以点 ![]() ![]() ![]() ![]() ④以点 ![]() ![]() ![]() ⑤过点 ![]() ![]() ![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/1/9cd90569-87da-44e0-a931-ec143726fd1e.png?resizew=146)
正确操作步骤的顺序是( )
A.②③④①⑤ | B.③④①②⑤ | C.①③④②⑤ | D.①②③④⑤ |
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【推荐2】如图,观察图中的尺规作图痕迹,下列说法错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/ced681d4-2606-4287-a87d-9a48c8dc7ab2.png?resizew=122)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/ced681d4-2606-4287-a87d-9a48c8dc7ab2.png?resizew=122)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在△ABC中,AB=AC,在AB、AC上分别截取AP,AQ,使AP=AQ,再分别以点P,Q为圆心,以大于PQ的长为半径作弧,两弧在∠BAC内交于点R,作射线AR,交BC于点D.若BC=6,则BD的长为( )
A.2 | B.3 | C.4 | D.5 |
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【推荐2】如图,在
中,
,按以下步骤作图:①以B为圆心,任意长为半径作弧,分别交
、
于M、N两点;②分别以M、N为圆心,以大于
的长为半径作弧,两弧相交于点P;③作射线
,交边
于D点.若
,
,则线段
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94e1ca12da27075e5241b7c7ce74672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/625befa6-ea9c-406b-898e-65c6997c9729.png?resizew=150)
A.3 | B.5 | C.![]() | D.6 |
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【推荐1】如图,
是等边三角形,以点B为圆心,任意长为半径画弧,交
于点E、F.再分别以E、F为圆心,大于
长为半径画弧,两弧交于点D.连接
交
于点G,
度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d092504d3c33c48be43f23b788efd9.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/5af342d3b871ace448ccc7c648528288.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知:线段AB
![](https://img.xkw.com/dksih/QBM/2018/2/12/1880557110534144/1881065110724608/STEM/b3bc355bbdad424cae06e644b1246ff0.png?resizew=182)
作法:(1)分别以点A和B为圆心,大于
AB的长为半径作弧,两弧相交于点C和D.
(2)作直线CD.
直线CD就是线段AB的( ).
![](https://img.xkw.com/dksih/QBM/2018/2/12/1880557110534144/1881065110724608/STEM/b3bc355bbdad424cae06e644b1246ff0.png?resizew=182)
作法:(1)分别以点A和B为圆心,大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)作直线CD.
直线CD就是线段AB的( ).
A.中线 | B.高线 | C.中垂线 | D.不确定 |
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【推荐1】如图,在锐角
中,
,
,
的平分线交
于点
,
、
分别是
,
上的动点,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6834ac70927ae08d7d36a1922403c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81e24376a13d648c2ed0dc73bc710e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95e98288acdd662de9a3dae1fcf0368.png)
A.3 | B.2 | C.![]() | D.![]() |
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【推荐2】如图,
的周长为26,点D,E都在边
上,
的平分线垂直于
,垂足为Q,
的平分线垂直于
,垂足为P.若
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
A.2 | B.3 | C.6 | D.8 |
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