如图1是一种利用镜面反射,放大微小变化的装置.木条BC上的点P处安装一平面镜,BC与刻度尺边MN的交点为D,从A点发出的光束经平面镜P反射后,在MN上形成一个光点E.已知AB⊥BC,MN⊥BC,AB=6.5,BP=4,PD=8.
![](https://img.xkw.com/dksih/QBM/2022/4/28/2973739813445632/2985717919555584/STEM/d95fe29a-3b8d-4bdc-bdad-2afe9fc512c7.png?resizew=256)
(1)求ED的长.
(2)将木条BC绕点B在平行于纸面的平面内顺时针方向旋转一定角度得到
(如图2),点P的对应点为
,
与MN的交点为
,从A点发出的光束经平面镜
反射后,在MN上的光点为
.若
,求
的长.
![](https://img.xkw.com/dksih/QBM/2022/4/28/2973739813445632/2985717919555584/STEM/d95fe29a-3b8d-4bdc-bdad-2afe9fc512c7.png?resizew=256)
(1)求ED的长.
(2)将木条BC绕点B在平行于纸面的平面内顺时针方向旋转一定角度得到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0f0ccc8492a0ccf1eee24867060643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0f0ccc8492a0ccf1eee24867060643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36bb676b68c803d9402ee9c1e584a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827be85b8f921007a5cf9edb64bd3491.png)
更新时间:2022-05-23 18:41:34
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相似题推荐
解答题-证明题
|
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名校
【推荐1】如图1,点E在
上,点F在
上,点M在直线
之间,且
,
;
(2)如图2所示,点M、N在
之间,且位于
的异侧,连
,若
,则
,
,
三个角之间存在何种数量关系,并说明理由.
(3)如图3,连接
,
;
,且
平分
.若
,
与
的三等分线交于N,则
__________(用含
的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bf3ac4b31c4892ca775047ed6c1e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
(2)如图2所示,点M、N在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8568240aadfe46277f0cde14ac83c634.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b59874dae8b394a4e434aa3875708a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05cbf5c2be437d5794e83deca8a53e7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bfa0bbe05b01453e6ed15d74da2602.png)
(3)如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982f824aa56c399260dcf6e83d169344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44faf78bfa94c0a54b98b418cafeed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f68e4414c9ab464bf433385c03705f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/572eff69e7d466a942ee653bbb1536d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b6e4330927acd53f2006bb60b6a1be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd00540dba9c02cf78f01abd08db7cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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【推荐2】四边形
中,
,M为
上一点,连
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/ec67bae2-1e0c-4b50-83b6-6dce8ebd942a.png?resizew=450)
(1)
平分
,
,
①如图1,求证:
;
②如图2,若
平分
,交
于F,交
于N,
,
;
(2)在(1)的条件下求
的值;
(3)如图3,当
,
时,试探究
与
的数量关系,证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/ec67bae2-1e0c-4b50-83b6-6dce8ebd942a.png?resizew=450)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0be18632fc31edc4d942c3b78397b72.png)
①如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaaebfe71f05fba9ab5022722cf4806f.png)
②如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418dd9a0df89936a2f12bfc2b8a9ab48.png)
(2)在(1)的条件下求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbcd8bd4d718f41974bf01ff2430b00f.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338397e93d01c65a5bd1bbd210ff72f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c8c8ff538c18e149f9f8583de5acc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b3d5f2fe84638e0b66e59dfb19ead8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf7a961a55aa7f225fadb6a25a60c75.png)
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【推荐1】如图1,在正方形ABCD中,点P是对角线BD上的一点,连结CP,AP
;
(2)如图2,延长AP交线段DC于点Q,交BC的延长线于点G,点M是GQ的中点,连结CM.求证:
;
(3)如图3,延长AP交射线DC于点Q,交BC于点G,点M是GQ的中点,连结CM.若
,
.求AB的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de62ff8f1bf2bd2225fa2cf8a72f319.png)
(2)如图2,延长AP交线段DC于点Q,交BC的延长线于点G,点M是GQ的中点,连结CM.求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/844e174e3c4910dad64b960474b4a4ed.png)
(3)如图3,延长AP交射线DC于点Q,交BC于点G,点M是GQ的中点,连结CM.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122e3e53a614abc840775b9d4f7b950c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cedbf2b61559686dc80d20777c4baed.png)
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解答题-问答题
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【推荐2】在矩形
中,
,
,点
从点
出发沿
边以
的速度向点
移动(点
可以与点
重合),同时,点
从点
出发沿
以
的速度向点
移动(点
可以与点
重合),其中一点到达终点时,另一点随之停止运动.设运动时间为
秒.
(1)如图1,几秒后,
的长度等于
?
(2)如图1,几秒后,
的面积等于四边形
面积的
?
(3)若以
为圆心,
为半径作
.如图2,若
与四边形
的边有三个公共点,则
的取值范围为_____.(直接写出结果,不需说明理由)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b35ed92397da56c7afbd6967597a9611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9547f6b5c7c54d216ecea72becb7d373.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/7/2cfa7c29-a986-4ef9-99f3-0cda607d5f80.png?resizew=251)
(1)如图1,几秒后,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
(2)如图1,几秒后,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
(3)若以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cdefde4fe3f81ce29c680146d69e6e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐1】如图,在
中,
,
,点D为AB延长线上一点,连接CD,过A分别作
,垂足为M,交BC于点N,作
,垂足为P,交CD于点Q.
![](https://img.xkw.com/dksih/QBM/2019/4/13/2181664167862272/2185367941455872/STEM/a11aa247354e48a08c48847bb46de2b6.png?resizew=377)
求证:
;
如图,点E在BA的延长线上,且
,连接EN并延长交CD于点F,求证:
;
在
的条件下,当
时,请直接写出
的值为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7281b641656a5992abaafb4190ca9afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d584b9a3d927c852b37104ef46dd395e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa24e44e60de1d126639f5fc04ccd074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ae16c6aee9a581e6af4e6942add3c6.png)
![](https://img.xkw.com/dksih/QBM/2019/4/13/2181664167862272/2185367941455872/STEM/a11aa247354e48a08c48847bb46de2b6.png?resizew=377)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46da45a60918b4232f214f69ab078e97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe8bafd5532e939776e502cd27868a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3b731119373444764ca2c51cfdbb60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bb89a362c1faf4d0c306eabbb59710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20950dff064563a96e319ba19a02c2a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf772c19ba106c74f7179f406eb1f7d.png)
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【推荐2】如图,在
中,
,在
上取点
,作
交
的延长线于点
,
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610320392896512/2614068791214080/STEM/beb0eda05e19455eba51f490f269a267.png?resizew=187)
(1)求证:
.
(2)当
时,求
.
(3)在(2)的条件下,作
的平分线,与
交于点
.若
,求
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0601713aa8218cb928f5c352964a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd66f89184ca925f4575c26053decf2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610320392896512/2614068791214080/STEM/beb0eda05e19455eba51f490f269a267.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c533b04ab1c9dc57bd2b08a5cee8d46.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05c97b3aa758ec726b44e1007312a1a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eece48c2f6b5c36b3bf411002eb6855.png)
(3)在(2)的条件下,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc39144b305c67d44410d41053a1d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐1】(1)如图1,
为等腰直角三角形,
,求证:
.
(2)如图2,在(1)的条件下,连结
,
,求
的长.
(3)如图3,在
中,
,
分别在直角边
,
上,
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11e1548c61a8ac7e3d2bef119ac3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8d3ccd7f28134caf40775d3a91f4ca.png)
(2)如图2,在(1)的条件下,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6ff3b7f36ee0351ad94e0a8851ff4c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/3b2955344250c7d5446e161c01525d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81b0947e66d250a7c383f40c5337ee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0b732912cec85d7818ba891cdf82ed.png)
![](https://img.xkw.com/dksih/QBM/2022/3/18/2938659084779520/2947299336855552/STEM/09c02a20-83ac-4d99-b558-0cd35450e626.png?resizew=553)
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【推荐2】半径为2cm的⊙O与边长为2cm的正方形ABCD在水平直线l的同侧,⊙O与l相切于点F,DC在l上.
![](https://img.xkw.com/dksih/QBM/2013/9/13/1573683607855104/1573683613917184/STEM/6bc26404739843ada0ecbce080f00ad9.png?resizew=468)
(1)过点B作的一条切线BE,E为切点.
①填空:如图1,当点A在⊙O上时,∠EBA的度数是 ;
②如图2,当E,A,D三点在同一直线上时,求线段OA的长;
(2)以正方形ABCD的边AD与OF重合的位置为初始位置,向左移动正方形(图3),至边BC与OF重合时结束移动,M,N分别是边BC,AD与⊙O的公共点,求扇形MON的面积的范围.
![](https://img.xkw.com/dksih/QBM/2013/9/13/1573683607855104/1573683613917184/STEM/6bc26404739843ada0ecbce080f00ad9.png?resizew=468)
(1)过点B作的一条切线BE,E为切点.
①填空:如图1,当点A在⊙O上时,∠EBA的度数是 ;
②如图2,当E,A,D三点在同一直线上时,求线段OA的长;
(2)以正方形ABCD的边AD与OF重合的位置为初始位置,向左移动正方形(图3),至边BC与OF重合时结束移动,M,N分别是边BC,AD与⊙O的公共点,求扇形MON的面积的范围.
您最近一年使用:0次