如图中的每个小正方形的边长均相等,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/a3c9e06f-a993-4582-b88e-50bc8cdb3fee.png?resizew=143)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd01722c6f4bf06ae7d753938e5b8bc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/a3c9e06f-a993-4582-b88e-50bc8cdb3fee.png?resizew=143)
A.1 | B.![]() | C.![]() | D.![]() |
2024九年级下·全国·专题练习 查看更多[3]
(已下线)专题02 解直角三角形(六大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(北师大版)(已下线)专题02 解直角三角形(六大类型)(题型专练)-2023-2024学年九年级数学下册《知识解读·题型专练》(人教版)广东省广州市西关外国语学校2023-2024学年九年级下学期月考数学试题
更新时间:2024-04-07 11:30:44
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【推荐1】如图,
中,
,
,
是
上一点,且
,过点
分别作
,
,垂足分别是
,下列结论:①
;②
是
的中点;③
垂直平分
;④
;其中正确的个数为( )
![](https://img.xkw.com/dksih/QBM/2019/8/2/2260140360900608/2260194920783872/STEM/380f6122-b36d-49f6-b64f-b86ef772180e.png?resizew=96)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebd3dbf4fae1591e22cd6a9dc89dbca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78002bca853929365a3f58082f3e7637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d276d0010fd458383ea3dd61415e1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193fde65db435cd4ab37315e6cef7b6d.png)
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A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图,在
中,
,
,
,垂足为
,
的平分线交
于点
,若
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/c66e45ca-ea8f-47f0-9506-74b004eca817.png?resizew=118)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b173ac8cc4ac4f1c9e1daaa605fbb27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18f38545fb6d8ba32c993f60dc9a774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,每个小正方形的边长都是1,
,
,
分别在格点上,则
的度数为( ).
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图所示的2×2的小正方形方格中,连接AB、AC、AD.则下列结论错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/c166bd28-0da9-4fb6-af06-72643d48bd8f.png?resizew=112)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/19/c166bd28-0da9-4fb6-af06-72643d48bd8f.png?resizew=112)
A.∠1+∠2=∠3 | B.∠1+∠2=2∠3 |
C.∠1+∠2=90° | D.∠1+∠2+∠3=135° |
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【推荐1】一个三角形的三边之比为
,则这个三角形是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e83a5cbadb0a7688e14ef6053fcb79d.png)
A.直角三角形 | B.锐角三角形 | C.钝角三角形 | D.无法确定 |
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