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解题方法
1 . 第31届世界大学生夏季运动会,是继2001年北京大运会、2011年深圳大运会之后,中国大陆第三次举办世界大学生夏季运动会,也是中国西部第一次举办世界性综合运动会.共设篮球、排球、田径、游泳等18个体育项目.届时将有来自约170个国家和地区的1万余名运动员及官员赴蓉参加.现某学校决定将一个直角三角形的空地划分为多个部分,为该校运动员打造一个训练场地.已知直角
中,
.经过全校海选后,现有以下两种设计方案:①如图1,在
内部取一点T,使得
,
;②如图2,在斜边AC上取两点P,Q,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/ca96b2e2-128b-4c1b-a583-ef1bcd991d6d.png?resizew=235)
(1)求方案①中折线跑道TA,TB,TC的长度之和;
(2)求方案②中训练场地
的面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47049a2a54fadcbe66dfb41b0d3750f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d41af77f20008822f434e1ecf850e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31050f9d3edb1228fdc5bbed358ecd33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02fea12724c881e541eb50c5f8f0d080.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/ca96b2e2-128b-4c1b-a583-ef1bcd991d6d.png?resizew=235)
(1)求方案①中折线跑道TA,TB,TC的长度之和;
(2)求方案②中训练场地
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c495b8fd7f7bb21c177c9d50fbf6919.png)
您最近一年使用:0次
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2 . 如图所示,某镇有一块空地
,其中
,
,
.当地政府计划将这块空地改造成一个旅游景点,拟在中间挖一个人工湖
,其中
,
都在边
上,且
,挖出的泥土堆放在
地带上形成假山,剩下的
地带开设儿童游乐场.设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/1169cc72-0651-4f12-911b-94801ab39879.png?resizew=125)
(1)求
的长(用
表示);
(2)为节省投入资金,人工湖
的面积要尽可能小,问如何设计施工方案,可使
的面积最小,最小面积是多少.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29ac2834e2f2f1c32149fe31f107134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac60c80d4e7a767b37931f6720d7ade6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b0eb72986587ffecf87c22a224bcd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edafce95aade0386bc0d78f679dcf47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf2b5e712b42f748a3c30bb5d160c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb35158a52a23a6e57ff890cef8c7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/1169cc72-0651-4f12-911b-94801ab39879.png?resizew=125)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)为节省投入资金,人工湖
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
您最近一年使用:0次
名校
3 . 如图所示,某镇有一块空地
,其中
,
,
.当地政府计划将这块空地改造成一个旅游景点,拟在中间挖一个人工湖
,其中
,
都在边
上,且
,挖出的泥土堆放在
地带上形成假山,剩下的
地带开设儿童游乐场.设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/47cfffe3-eb82-4e0f-bdfc-04d7e80f8d01.png?resizew=120)
(1)若
,问此时人工湖用地
的面积是堆假山用地
的面积的多少倍
(2)为节省投入资金,人工湖
的面积要尽可能小,问如何设计施工方案,可使
的面积最小,最小面积是多少.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29ac2834e2f2f1c32149fe31f107134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac60c80d4e7a767b37931f6720d7ade6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b0eb72986587ffecf87c22a224bcd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edafce95aade0386bc0d78f679dcf47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf2b5e712b42f748a3c30bb5d160c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb35158a52a23a6e57ff890cef8c7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/47cfffe3-eb82-4e0f-bdfc-04d7e80f8d01.png?resizew=120)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2212c19e55001b3cd6c7c656edeae538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edafce95aade0386bc0d78f679dcf47.png)
(2)为节省投入资金,人工湖
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
您最近一年使用:0次
2021-04-25更新
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633次组卷
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2卷引用:四川省成都市树德中学2020-2021学年高一下学期4月月考数学试题