题型:解答题-问答题
难度:0.85
引用次数:54
题号:17774229
如图:已知
和C、D两点,求作一点P,使
,且P到
两边的距离相等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed66431681da1db8f7cb0f40cd19201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/00e7c79a-0114-4a40-ac7e-da965eea1979.png?resizew=152)
更新时间:2023-01-03 14:08:09
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解答题-问答题
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【推荐1】如图,在△ABC中,∠C=90°,AD平分∠BAC,DE⊥AB,如果DE=5cm,∠CAD=32°,求CD的长度及∠B的度数.
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解答题-证明题
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【推荐2】如图,平行四边形
中,
,
的平分线
交
于G,交
于P,交
延长线于E,
,
(1)求证:四边形
是菱形;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb6694f3443cc5f4d09948679251b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/e9fdf3a800804988b52f3d1a72228a8d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/db8627ab-1f5a-4794-a52d-ba571037b97e.png?resizew=208)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc72e22c2c9701c1ec79c4a1c10951c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0f73b3c63084d9c032802e01f9a168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-作图题
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【推荐1】如图,在四边形
中,
,
平分
,交
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/8fc66bdd-123b-4262-b748-14138d959339.png?resizew=109)
(1)用直尺和圆规作
的平分线,交
于点F;(保留作图痕迹,不写作法)
(2)求证:
.
证明:
,且
,
①
,
∴
②.
平分
,
平分
,
∴
③,
∴ ④
,
,
,
∴ ⑤
,
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9affa53e6a5a874b3fa57d484ca383d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/8fc66bdd-123b-4262-b748-14138d959339.png?resizew=109)
(1)用直尺和圆规作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3255ac1b6f934fcb4aa742a81bd8aef6.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e45f1a47a09de543d31b4e3d82e9622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853e81b1b9606ad25244ff82c8292df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a778ccde329549bff5a0b1f0976e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ab31993e89b1d4a75ae7771c148520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f4a7f1a6dfa08befdd6f524b57ecf1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c27b5d9b162a27cdaaf90a9ea9e4346.png)
∴ ④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2d3ca5017b813eba3d6a83621d9f22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330b789bf5d81fe8e40865962a5741b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09976a6ee700936ffb16a5f709ee506c.png)
∴ ⑤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7cf6b495555a550d5d534f32b9f5148.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3255ac1b6f934fcb4aa742a81bd8aef6.png)
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【推荐2】画图(不用写作法,要保留作图痕迹)尺规作图:求作∠AOB的角平分线OC.
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【推荐1】如图,反比例函数
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和点B,点B在点A的下方,连接
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平分
,交y轴于点C.
(1)求反比例函数的表达式;
(2)请用无刻度的直尺和圆规作出线段
的垂直平分线;(要求:不写作法,保留作图痕迹)
(3)线段
与(2)中所作的垂直平分线相交于点D,连接
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0953f4a49fe985dab459c5d85f294c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7f3d1dc60275383fe25a8cc3de6fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bc29145f6e7557711c34b443bd5e84.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/d1ac6341-3cff-4830-b04d-d63ee39a0e19.png?resizew=215)
(1)求反比例函数的表达式;
(2)请用无刻度的直尺和圆规作出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151adae7bf60f109d3f275fd9fd4e5b6.png)
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【推荐2】如图,在
中,
,点P在线段
上,点Q在线段
上,且
.
(1)尺规作图:作线段
的垂直平分线交
于点E,交
于点F(保留作图痕迹,不写作法);
(2)在(1)所作的图中,连接
.若
,
,求四边形
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.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/b38bbd93669765af69d7bb0049e2819b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/ae2bf8ca-7faa-4ef2-838c-829bdcc41003.png?resizew=149)
(1)尺规作图:作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
(2)在(1)所作的图中,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db98944263c64c6323457bb7e3aecc09.png)
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解答题-作图题
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【推荐1】如图所示的是一块打碎的圆镜的一部分,已知弧上有三点
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d7dc7f8aa5d13559aa43c9c69bf14d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/926e659d-4407-4e6d-98ed-13f3b9d6c5ae.png?resizew=160)
(1)请用无刻度的直尺和圆规作出图中圆镜的圆心
.(要求:不写作法,保留作图痕迹)
(2)已知
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55d2649a844e8619de4663a03c233f0.png)
,求圆镜的半径
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d7dc7f8aa5d13559aa43c9c69bf14d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/926e659d-4407-4e6d-98ed-13f3b9d6c5ae.png?resizew=160)
(1)请用无刻度的直尺和圆规作出图中圆镜的圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4300aefd67369742e2b1ddcdc02dd495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55d2649a844e8619de4663a03c233f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72026e70f45cea6a7c49881592e73a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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解答题-作图题
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【推荐2】如图,C是∠AOB内部一点,D是∠AOB外部一点,在内部求作一点P,使PC=PD,并且使P点到∠AOB两边距离相等(保留作图痕迹).
![](https://img.xkw.com/dksih/QBM/2022/3/21/2941033878683648/2942457628680192/STEM/ccc09108198146d985f01e027b66b10f.png?resizew=89)
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