如图,
、
、
所组成的图形叫做勒洛三角形
.它是以等边三角形
的每个顶点为圆心,以其边长为半径,在另外两个顶点间做一段弧,由三段弧所围成的曲边三角形.若
,顶点A与数轴上表示
的点重合,将勒洛三角形
向右沿数轴滚动一周,则点A对应的数是____ .
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/0f027d0f-1416-41bd-a32f-2361d633cf44.png?resizew=323)
更新时间:2023-12-07 20:47:45
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【推荐1】如图,在矩形
中,
,
,
在数轴上,且点A表示的数是
,若以点A为圆心,对角线
的长为半径作弧交数轴的正半轴于点M,则点M表示的数是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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【推荐2】已知:实数a,b在数轴上的位置如图所示,化简:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafe344778b62ec95afea1cc74d0f4a0.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafe344778b62ec95afea1cc74d0f4a0.png)
![](https://img.xkw.com/dksih/QBM/2023/4/17/3218506015481856/3252645385764864/STEM/4b3bafd283bd46c8809746cd8f192e56.png?resizew=275)
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【推荐1】如图所示的曲边三角形可按下述方法作出:作等边
,分别以点A、B、C为圆心,以AB长为半径,作
、
、
,三弧所围成的图形就是一个曲边三角形.若
,则此曲边三角形的面积为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/5dda9dda-a772-4cc7-8a89-2eac97c9678e.png?resizew=154)
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【推荐2】已知等边三角形的边长为
,则它的面积为________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd6f4250ca6b1b9bce234a01f00d44d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
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【推荐1】若扇形的圆心角是
,半径为2,则它的弧长为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
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【推荐2】用一个半径为10cm半圆纸片围成一个圆锥的侧面(接缝忽略不计),则该圆锥的高为______ .
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