1 . 如图,在等边
的边上分别取点D,E,F,使
,连接
,
,
.
结论Ⅰ:当
时,
的面积取得最小值;
结论Ⅱ:若点O是
的外心,则它一定也是
的外心.对于结论Ⅰ和Ⅱ,下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bcb4e1c3913b81c0096f1a14096d677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
结论Ⅰ:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
结论Ⅱ:若点O是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
A.Ⅰ和Ⅱ都对 | B.Ⅰ和Ⅱ都不对 |
C.Ⅰ不对Ⅱ对 | D.Ⅰ对Ⅱ不对 |
您最近一年使用:0次
2 . 如图所示,
为等腰直角三角形,
,正方形
边长也为2,且
与
在同一直线上,
从C点与D点重合开始,沿直线
向右平移,直到点A与点E重合为止,设
的长为
,
与正方形
重合部分(图中阴影部分)的面积为y,则y与x之间的函数关系的图象大致是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6baeb4763aeb5c65b9aeee8e5c49e1c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 已知正方形的边长为
,则它的面积
与边长
的函数图象为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012b14b48c09eb820c49c13dccb642bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3646f7feb3fb24f06a7fb9aaace7de39.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
4 . 已知一个直角三角形两直角边长之和为10 cm,则这个直角三角形的最大面积为( )
A.6.25 cm2 | B.12.5 cm2 | C.25 cm2 | D.31.25 cm2 |
您最近一年使用:0次
5 . 如图,若用长
的铁丝借助墙
围成一个斜边为
的直角三角形
,则所围成的
的最大面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/2136d2d3-a1f9-4e5b-af3f-7f30d30964f6.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/733f18665886669b11bc5e4945d7a943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8946331b0a9d86e1a9c78797f3021455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6c91095a761f7c3f2197035b3ae272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73892892025e13b6d45f88a266b1fe6f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/2136d2d3-a1f9-4e5b-af3f-7f30d30964f6.png?resizew=184)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 如图,某劳动小组借助一个直角墙角围成一个矩形劳动基地
,墙角两边
和
足够长,用总长
的篱笆围成另外两边
和
.有下列结论:
的长是
时,劳动基地
的面积是
;
②
的长有两个不同的值满足劳动基地
的面积为
;
③点
处有一棵树(树的粗细忽略不计),它到墙
的距离是
,到墙
的距离是
,如果这棵树需在劳动基地内部(包括边界),那么劳动基地面积的最大值是
,最小值是
.
其中,正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2fc57da7f8399eae9ad9ad22ca836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167e6e41ac221847824a72e964f340f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6307c0249ba768c1c0c9a253c31720d2.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb92c9032804326713c7b4feea53f40.png)
③点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e978c77cb0d7eff794447241e9829867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ea92883fe24b097c9a881ef8c92eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a796b826cc01a89d10f83be5e29d7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fb5474bdc74da700b463eabd05bd8e.png)
其中,正确结论的个数是( )
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
7 . 如图,是一块菱形新型平面材料
,
,
,点E在
上,且
垂直于
,先沿着
切开材料,然后在四边形
内切割出一块矩形,且矩形相邻两边落在
,
上,一个顶点落在
边上.设边
上矩形的边长为
,矩形的面积为
.有下列结论:①y与x之间的函数关系式为:
;②当
时,切割出矩形后,四边形
剩余的面积为
;③若切割出的矩形材料用于某种生产时,售价为
元/
,则当
时,出售此块矩形材料的总价最大,最大值为
元.其中,正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/695525d00319665b1ad0d01717979523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9889e15ad926dfc0dfa2a2fc33e53dd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc1cbcd6d00f0c36bad8254297d9f33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740004cfdade4c185f722dadc27e15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a8c94103cbd283ac3cfceaa42af133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ff06692c025b869a7bcdcff15dca9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bfad3f7e65188bcf7f62ea5acdbf4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e03c716ab81f50eee011e7b659e5bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8f58755aee89fb2cf72ba518dcee2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fc1419fe4cc7fc0e9624ffd036f3d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9c198bddd2c3d495cdb556f67404417.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
8 . 如图,在钝角
中(
为钝角),
,
,
,在其内部作一个矩形
,使矩形的一边
在边
上,顶点M,P分别在边
,
上.设矩形的一边
,矩形的面积为y,则y与x的函数关系式可用函数图象表示为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c406e7d1e7977dd5b30ef81cfdc8e8d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db492efc6bfe199d47633e6d5946ad57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3171b3d11c6f4619e189677345357508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/ef0409dcc992e45d68b10278f941b0c9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-04-11更新
|
124次组卷
|
2卷引用:2024年甘肃省兰州市中考一模数学模拟试题
9 . 下面的问题中有两个变量:
①将水箱中的水匀速放出,直至放完,水箱中的剩余水量y与放水时间x;
②用长度一定的绳子围成一个矩形,矩形的面积y与一边长x.
其中,变量y与变量x之间的函数关系可以用如图所示的图象表示的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/883c5a25-a3fe-4a8f-a22f-bfe333c3f9bb.png?resizew=176)
①将水箱中的水匀速放出,直至放完,水箱中的剩余水量y与放水时间x;
②用长度一定的绳子围成一个矩形,矩形的面积y与一边长x.
其中,变量y与变量x之间的函数关系可以用如图所示的图象表示的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/883c5a25-a3fe-4a8f-a22f-bfe333c3f9bb.png?resizew=176)
A.①② | B.① | C.② | D.①②均不是 |
您最近一年使用:0次
10 . 在
中,
,
是锐角,若
,且
,则
面积的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a3b37c1b382628dc3ab9f0a97c80b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e8f6faf46c448fe8d838fde1af495b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6a9b103299a6ccb134bb8044038e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次