如图,①以点
为圆心,任意长为半径画弧,分别交
,
于点
,
;②面一条射线
以点
为圆心,
长为半径画弧,交
于点
;③以点
为圆心,
长为半径画弧,与第②步所画的弧相交于点
;④过点
画射线
.则有
.其依据是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48e33eaa40d01f976230d4b73ae91dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48e33eaa40d01f976230d4b73ae91dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6637859805b7b01f7a9a64771563406e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27949b9eac364001ddbd7ec0ef2e0142.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-23 22:52:35
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【推荐1】如图,已知钝角三角形
,按以下步骤尺规作图,并保留作图痕迹.
步骤
:以
为圆心,
为半径画弧①;
步骤
:以
为圆心,
为半径画弧②,交弧①于点
;
步骤
:连结
,交
的延长线于点
.
下列叙述正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
步骤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
步骤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
步骤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
下列叙述正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/16/443a629f-522a-4115-ad1f-11a9233421a5.png?resizew=135)
A.![]() ![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,四边形
中,
,
,有如下结论:①
;②
;③
,其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/2019/12/19/2358331276976128/2359122909732864/STEM/db3eff19ccab480e819bef9afb3c4f8e.png?resizew=126)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4908fad3dc6fe1b0675c870328f043ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db1e8bc2891872c5373bcdc8c53ebdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/247c3440d315658358cadba6b656b240.png)
![](https://img.xkw.com/dksih/QBM/2019/12/19/2358331276976128/2359122909732864/STEM/db3eff19ccab480e819bef9afb3c4f8e.png?resizew=126)
A.0个 | B.1个 | C.2个 | D.3个 |
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【推荐1】如图,用尺规作图作∠AOC=∠AOB的第一步是以点O为圆心,以任意长为半径画弧①,分别交OA、OB于点E、F,那么第二步的作图痕迹②的作法是( )
A.以点F为圆心,OE长为半径画弧 |
B.以点F为圆心,EF长为半径画弧 |
C.以点E为圆心,OE长为半径画弧 |
D.以点E为圆心,EF长为半径画弧 |
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【推荐2】用尺规作一个角等于已知角. 已知.
. 求作:
, 使
.
作法如下:
(1)作射线
;
(2)以①为圆心,任意长为半径画弧, 交
于点 P、交
于点 Q;
(3)以点 E为圆心, 以②为半径画弧交
于点 D;
(4)以点 D为圆心,以③为半径画弧交前面的弧于点 F;
(5)过点F作④,
即为所求作的角.
以上作图步骤中,序号代表的内容错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0034942768ea8f24ec3184ab9c09673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b0b11a80e8b107e55534d7fda9f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a5b8513897ec704533ec0f8e99b996.png)
作法如下:
(1)作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8b62dc033d86ee9e561b8903796701.png)
(2)以①为圆心,任意长为半径画弧, 交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
(3)以点 E为圆心, 以②为半径画弧交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8b62dc033d86ee9e561b8903796701.png)
(4)以点 D为圆心,以③为半径画弧交前面的弧于点 F;
(5)过点F作④,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b0b11a80e8b107e55534d7fda9f2b.png)
以上作图步骤中,序号代表的内容错误的是( )
A.①表示点O | B.②表示![]() | C.③表示 | D.④表示射线![]() |
您最近一年使用:0次