已知:直线
,一块含30°角的直角三角板如图所示放置,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc310194575262fb45352c2fbc19868.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e03566282ef39ad17821036f228174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f497b14cd4ab6f0bece502e0acd37129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc310194575262fb45352c2fbc19868.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/27/7f677cf4-948f-4efb-8b13-3ad56e9e1c7d.png?resizew=154)
更新时间:2020-06-08 13:02:59
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【推荐1】如图,将一副直角三角板如图摆放,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/4ebcad63-37cc-4831-96dc-1dc62aa12bc4.png?resizew=220)
(1)
与
的位置关系是__________ ;
(2)在不标字母的情况下,找出与
相等的角是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef224452f452d0d65c6e84265a1e688f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/4ebcad63-37cc-4831-96dc-1dc62aa12bc4.png?resizew=220)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)在不标字母的情况下,找出与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482e68d608de7675e15bb759acd8204c.png)
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【推荐2】如图,一副三角板(直角顶点重合)摆放在桌面上,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e515787ebe97ed2662237d9ca51ea1.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322ee4e4eea934a85d4c11e934eb23c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e515787ebe97ed2662237d9ca51ea1.png)
![](https://img.xkw.com/dksih/QBM/2021/1/28/2645989949136896/2652439336738816/STEM/2a538dfd-bb17-4e3e-823e-e8753855f380.png?resizew=288)
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【推荐2】消防云梯其示意图如图所示,其由救援台
,延展臂
(B在C的左侧)、伸展主臂
、支撑臂
构成.在作业过程中,救援台
,车身
及地面
三者始终保持水平平行,为了参与一项高空救援工作,需要进行作业调整,如图,使得延展臂
与支撑臂
所在直线互相平行,且
,
,则这时![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b753dbb5a670dd4f5e23bb919e44dda2.png)
______ .(用含
,
的式子表示)
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2f721204d869a36ce877dcda0f1fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a240b8c619a6508830ba6e1c394cc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b753dbb5a670dd4f5e23bb919e44dda2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efc7b22d85ff04a0ac89743f0bea1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58aef15d9abadc5bab8876bce043f743.png)
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