有一块三角形余料
,它的边
厘米,高
厘米.要把它加工成正方形零件,使正方形的一边在
上,其余两个顶点分别在
,
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/6206b503-7187-4fbd-80f1-23762105b6a5.png?resizew=504)
(1)如图1,请问加工成的正方形零件边长是多少厘米?
(2)如图2,如果所要加工成的零件是矩形,其它条件不变,请问矩形面积是否存在最大值?如果存在,请求出满足最大值时矩形零件的两条边长.如果不存在,请说明理由.
(3)如图3,如果所要加工成的零件是一个黄金矩形(
),请直接写出这个黄金矩形的长和宽.(结果精确到
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f4c3d64ac2f0afd292bd0798d4ebd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99154aec25bfa23baa5343bf0c21991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/6206b503-7187-4fbd-80f1-23762105b6a5.png?resizew=504)
(1)如图1,请问加工成的正方形零件边长是多少厘米?
(2)如图2,如果所要加工成的零件是矩形,其它条件不变,请问矩形面积是否存在最大值?如果存在,请求出满足最大值时矩形零件的两条边长.如果不存在,请说明理由.
(3)如图3,如果所要加工成的零件是一个黄金矩形(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a10f9732b787b4bf8c677de161f1856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87796ee30e6c5d5e6b6285b32abe10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/368763128d1ad0ffad5d859fef834d0a.png)
更新时间:2023-02-08 10:45:40
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/20/6d902be4-f958-4ccc-8ca4-deb7624ed660.png?resizew=186)
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名校
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