如图,在正方形网格中,每个小正方形的边长均为1,每个小正方形的顶点叫格点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/051ca22b-d672-4d61-a437-bddb7538a88a.png?resizew=408)
(1)在图①中,以格点
为端点,画线段
.
(2)在图②中,以格点
为顶点,画菱形
,使其面积为12.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/051ca22b-d672-4d61-a437-bddb7538a88a.png?resizew=408)
(1)在图①中,以格点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72811997a9f65e01fcc1d318bbd4d0dc.png)
(2)在图②中,以格点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
更新时间:2022-08-31 20:24:06
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相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】问题背景:在
中,已知
,
,
三边长为
,
,
,求这个三角形的面积.
小辉在答题时先建立一个正方形网格(每个小正方形边长为1),再在网格中画出格点
(即
三个顶点都在小正方形的顶点处),如图所示.这样不需求
的高,而借用网格就能计算出它的面积.我们把上述求
面积的方法叫做构图法.
![](https://img.xkw.com/dksih/QBM/2022/2/20/2920065137074176/2923214881103872/STEM/3cb9e677-7747-411c-bcbb-711b4f6b3c6d.png?resizew=182)
(1)若
三边的长分别为
,
,
(
),请运用构图法求出
的面积;
(2)若
三边的长分别为
,
,
(
,
,且
),试运用构图法求出
的面积;
(3)已知
,
都是正数,
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50690dab38f4512eb72e18b7f86cf6f6.png)
小辉在答题时先建立一个正方形网格(每个小正方形边长为1),再在网格中画出格点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2022/2/20/2920065137074176/2923214881103872/STEM/3cb9e677-7747-411c-bcbb-711b4f6b3c6d.png?resizew=182)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e24b2ff05ffec78200a3f8241aabf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b818391ff42ad5582d85d13a63b9bbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac8801ddab7731b2827a127c2975f84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d535ebb8d7214da75184bc9215ce75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d16ed87b4147ca67b954d9b7b52bd9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6093a88d27a7f3e8624a3883105ad25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d9712c3b25f3030e166e136d3a4686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8792eaab0b6464e5d07436c64aa751a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ee012195ad00c8c9ab3c3fcbf2591c.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】图①,图②均是
的正方形网格,每个小正方形的顶点称为格点,小正方形的边长为1,点A,点B,点D,点E均在格点上,在给定的网格中按要求画图,所画图形的顶点均在格点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/dc464f94-abe7-43de-b815-8f1de0fd43b5.png?resizew=171)
(1)在图①中画出以
为斜边的等腰直角
,使点C在格点上;
(2)在图②中画出以
为斜边的直角
,使点F在格点上,且
和
不全等,再在
上找点P,使得
最短.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb9d60d456560e9bac66c8b20c49bb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/dc464f94-abe7-43de-b815-8f1de0fd43b5.png?resizew=171)
(1)在图①中画出以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)在图②中画出以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.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/4fb26d84907c923278ac4626a9d58947.png)
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解答题-问答题
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【推荐1】如图,菱形ABCD的对角线AC、BD相交于点O,
,
,OE与AB交于点F.
(2)若
,
,求菱形ABCD的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7acc0628dabbbaa929b7437021cad8a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a78e006003b83147e901b34688a7f0b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf461f23743af212618a987311a87a33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,已知矩形ABCD的两条对角线相交于点O,∠ACB=30°,AB=2.
![](https://img.xkw.com/dksih/QBM/2022/2/12/2914963027189760/2926178358525952/STEM/bcca8fe1191c4b038ccf41e97e0f7dc9.png?resizew=138)
(1)求AC的长及∠AOB的度数;
(2)以OB,OC为邻边作菱形OBEC,求菱形OBEC的面积.
![](https://img.xkw.com/dksih/QBM/2022/2/12/2914963027189760/2926178358525952/STEM/bcca8fe1191c4b038ccf41e97e0f7dc9.png?resizew=138)
(1)求AC的长及∠AOB的度数;
(2)以OB,OC为邻边作菱形OBEC,求菱形OBEC的面积.
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解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在正方形ABCD中,对角线AC,BD相交于点O,点E,F是对角线AC上的两点,且
,连接DE,DF,BE,BF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/15/44de82ac-4268-42e3-93ea-a977c40d2eb0.png?resizew=194)
(1)证明:
.
(2)若
,
,求四边形BEDF的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/15/44de82ac-4268-42e3-93ea-a977c40d2eb0.png?resizew=194)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca0657922ac82b761718b28a1cd93e2f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338c6c83ab4abc895ac36ab888a55be6.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】如图,O是菱形ABCD对角线AC与BD的交点,CD=5cm,OD=3cm; 过点C作CE∥DB,过点B作BE∥AC,CE与BE相交于点E.
(1)求证:四边形OBEC为矩形;
(2)求矩形OBEC的面积.
(1)求证:四边形OBEC为矩形;
(2)求矩形OBEC的面积.
![](https://img.xkw.com/dksih/QBM/2019/5/14/2203416727994368/2208688643072001/STEM/e0a859eecf1040aa89b1c179e1bdf877.png?resizew=107)
您最近一年使用:0次