1 . 解题与遐想.
王小明:
这道题算出来面积刚好是
,太凑巧了吧.刚好是
,有种白算的感觉![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
赵丽华:
我把
和
换成
、
再算一遍,
的面积总是
!确实非常神奇了![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
数学刘老师:
大家想一想,既然结果如此简单到极致,不计算能不能得到呢?比如,拼图?
霍佳:
刘老师,我在想另一个东西,这个图能不能尺规画出来啊感觉图都定了.我怎么想不出来呢?
拼图演绎
(1)将
分割放入矩形中(如左图),现在为了通过拼图能直接“看”出“
”,请在右图中画出拼图后的
个直角三角形甲、乙、丙、丁的位置,作必要标注.
(2)尺规作图:如图,点
在线段
上,以
为斜边求作一个
,使它的内切圆与斜边
相切于点
.
(保留作图的痕迹,写出必要的文字说明)
如图,![]() ![]() ![]() ![]() ![]() 求: ![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/51cae68d-6ee2-4b91-b4c4-a4f3985896db.png?resizew=162)
王小明:
这道题算出来面积刚好是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26a03dbc48c0a73bbf84851eec6d7784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
赵丽华:
我把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb74ca8fc86ddef279e33f31c1fedda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
数学刘老师:
大家想一想,既然结果如此简单到极致,不计算能不能得到呢?比如,拼图?
霍佳:
刘老师,我在想另一个东西,这个图能不能尺规画出来啊感觉图都定了.我怎么想不出来呢?
拼图演绎
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/ef287103-401a-4ee3-a610-7355e8fc4276.png?resizew=411)
(2)尺规作图:如图,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(保留作图的痕迹,写出必要的文字说明)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/2a32e14e-40e7-41bc-9dc6-137f7566bc9f.png?resizew=350)
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2 . 下面是“作一个角的平分线”的尺规作图过程.
已知:如图,钝角
.
求作:射线
,使
.
作法:
①在射线
上任取一点D;
②以点O为圆心,
长为半径作弧,交
于点E;
③分别以点D,E为圆心,大于
长为半径作弧,在
内,两弧相交于点C;
④作射线
.则
为所求作的射线.
(1)请根据作法,画出作图痕迹;
(2)完成下面的证明.
证明:连接
,由作图步骤②可知
______.
由作图步骤③可知
______.
∵
,
∴
(____________)(填推理的依据).
∴
.
已知:如图,钝角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/a7cea532-fda3-4f43-80df-34ea85ad148c.png?resizew=171)
求作:射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c1f18cef1745d84a0265246684753bd.png)
作法:
①在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
②以点O为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
③分别以点D,E为圆心,大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65026a6b6402cb599e14be8023a3f6a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
④作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
(1)请根据作法,画出作图痕迹;
(2)完成下面的证明.
证明:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74b8589dafca294fe3334ebba850b40f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514f4f3b3a53fc17d8268f012049acef.png)
由作图步骤③可知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ec5d678ec42846e1d28301e3bfd4be.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f21d7e4a30adcb4f1a8af10ba2491505.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc86e8df81bfe6cce1c23e24bfec2187.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c1f18cef1745d84a0265246684753bd.png)
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3 . 已知点A,点B和直线l,在直线l上求作一点P,使
最小.(尺规作图,保留作图痕迹,不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6da6b8007e3953e3884d3c601684a77.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/564eca80-6a91-4926-bad9-b2ebaccd121f.png?resizew=149)
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4 . 如图,已知
中,
,尺规作图(不写作法,保留作图痕迹)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/f0f5a509-735e-4717-a4ac-80a4894e41cb.png?resizew=127)
(1)在直线
上方求作一点D,使得
,其中
;
(2)在线段
上求作一点E,使得
,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/909c4d1ec174579cf7571a8b9a75763a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/f0f5a509-735e-4717-a4ac-80a4894e41cb.png?resizew=127)
(1)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc59fd975a9c1a044337fb4999308588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17fdc22bd80ccbfda06f3b9a2e46377.png)
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5 . 已知:线段
,
.求作:
,使得
,高
.
(要求:尺规作图,不写作法,保留作图痕迹.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c12252d244931a3ef6fcde8ae350441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5228da61bed106b28849ef91a2ec116.png)
(要求:尺规作图,不写作法,保留作图痕迹.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/9b6ac713-2130-4272-bfdf-395f8783e44a.png?resizew=283)
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6 . 如图,已知平面上四个点
,请按要求完成下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/a7340507-8c21-4a54-9e05-cd72bb2423e2.png?resizew=90)
(1)画直线
,射线
,连接
;
(2)在射线
上作点
,使得
(尺规作图,保留作图浪迹);
(3)请在直线
上确定一点
,使
最小,画出点
,此画图依据是_____________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4496fe22b40bc63581998e6b7ef6783.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/a7340507-8c21-4a54-9e05-cd72bb2423e2.png?resizew=90)
(1)画直线
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad2563f18f321e5fcf4a9f5ba1fd26.png)
(3)请在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9475d0a8fbf5d5a10ac0689440c36fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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7 . 【阅读理解】借助一些巧妙的工具,我们可以解决一些几何问题. 图
是一个平分角的仪器,其中
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/2167d29f-b9b3-479e-9546-7621a686ee07.png?resizew=497)
(1)如图
,将仪器放置在
上,使点
与顶点
重合,
,
分别在边
,
上,沿
画一条射线
,交
于点
.可得
是
的平分线. 请说明理由.
(2)如图
,在(1)的条件下,过点
作
于点
,若
,
,
的面积是
,求
的长.
【拓展迁移】小明探究完角平分仪后将工具的原理迁移到尺规作图的原理,并思考利用尺规“三等分特殊角”的方法. 在“三等分角”的探索过程中,小明发现了许多利用尺规三等分特殊角的方法,利用尺规三等分
角的方法就是其中的一种,方法如下:①如图
,在
的边
上取一点
;②以
为边在
上方作等边
,作射线
;③作
的平分线
,作
的平分线
,则射线
,
将
三等分.
【联系运用】(3)如图
,
,利用材料中的方法,将
三等分.(要求:尺规作图并保留作图痕迹 ,标明字母).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870db8090d5c4d194c25cf1355968f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d77b021bfecc78d8a55ed65ed69cd4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/2167d29f-b9b3-479e-9546-7621a686ee07.png?resizew=497)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5886d4b31a8d7249d3eea076d1f40354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348216467fda035329fe8fac46b39911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3779b4ea5477aebfe85113b0de1d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
【拓展迁移】小明探究完角平分仪后将工具的原理迁移到尺规作图的原理,并思考利用尺规“三等分特殊角”的方法. 在“三等分角”的探索过程中,小明发现了许多利用尺规三等分特殊角的方法,利用尺规三等分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.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/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2460507a462453e084eaf70a7d867e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
【联系运用】(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/48b344bf-bc98-4764-9fab-a17349deb34f.png?resizew=405)
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8 . 如图,已知
.
![](https://img.xkw.com/dksih/QBM/2023/11/16/3369240438677504/3371416239833088/STEM/f0ab7b8f698c4c1c81bcccffa5bbb913.png?resizew=170)
(1)在
边上找一点
,使得点
到
,
边的距离相等(用尺规作图,保留作图痕迹,不要求写作法);
(2)在(1)的条件下,若
,
,且
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2023/11/16/3369240438677504/3371416239833088/STEM/f0ab7b8f698c4c1c81bcccffa5bbb913.png?resizew=170)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee5bd6f04872ef8d3d833d0e2056161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
9 . 如图,已知弓形的弦长
,弓高
,(
,并经过圆心
).
(1)请利用尺规作图的方法找到圆心
;(保留作图痕迹,不必写作法)
(2)求弓形所在
的半径的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b1927db96d84f27197b5a654b622f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/6c875030-e37e-468e-983d-2e6b6ab496e1.png?resizew=137)
(1)请利用尺规作图的方法找到圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)求弓形所在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
10 . 如图1,是小飞制作的蝴蝶风筝,蝴蝶风筝的骨架图如图2所示,其中
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/e0553720-c5d0-44ab-b35d-4b1ea00cc228.png?resizew=310)
(1)求
的度数;
(2)尺规作图作出图2的对称轴
(只保留作图痕迹,不必写作法).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10298ff03e6f6368aac88c2cdd201197.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/e0553720-c5d0-44ab-b35d-4b1ea00cc228.png?resizew=310)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
(2)尺规作图作出图2的对称轴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次