如图,在四边形
中,
,
,
,
为
的中点,若点
在线段
上以
的速度由点
向点
运动,同时,点
在线段
上由点
向点
运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/96843840-2084-4307-a8fe-2c4f9713a18a.png?resizew=150)
(1)若点
运动的速度是
,经过1秒后,
与
是否全等,请说明理由;
(2)若点
的运动速度与点P的运动速度不相等,当
与
全等时,求出点
的运动速度.(提示分①
;②
两种情况讨论解答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9040c9795e7132ebf65ede1f98c4d72b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f5e900da706536c57f7c1ae7a1174a.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c317a2e011d24dba118a3d80f799bd08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/96843840-2084-4307-a8fe-2c4f9713a18a.png?resizew=150)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c317a2e011d24dba118a3d80f799bd08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3cd61d00f89e68ccca2cac5c937783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb4853c9f383c2f9956ba6d672c1c45.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3cd61d00f89e68ccca2cac5c937783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb4853c9f383c2f9956ba6d672c1c45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de2259d8aa9d0f947a507505b7d4b7d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b539ad330f39b9ea2e9ebb3c99a2489.png)
20-21八年级·全国·假期作业 查看更多[4]
(已下线)练习1 全等三角形的性质-2020-2021学年【补习教材·寒假作业】八年级数学(苏科版)(已下线)易错10 全等三角形中动点问题易错-2020-2021学年七年级数学下册期末突破易错挑战满分(北师大版)陕西省延安市富县2021-2022学年八年级上学期第一阶段数学试题河南省南阳市桐柏县2021-2022学年八年级上学期第二次段考数学试题
更新时间:2021-10-27 17:14:08
|
【知识点】 用SAS直接证明三角形全等(SAS)解读
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【推荐2】如图,已知△ABF≌△DEC,且AC=DF,说明△ABC≌△DEF的理由.
解:∵△ABF≌△DEC
∴AB= ,BF= ,∠B= .
又∵BC=BF+ ,EF=CE+ .
∴BC= .
在△ABC与△DEF中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bee5639d7aee3b703618dec3fc2ce13.png)
∴△ABC≌△DEF( )
解:∵△ABF≌△DEC
∴AB= ,BF= ,∠B= .
又∵BC=BF+ ,EF=CE+ .
∴BC= .
在△ABC与△DEF中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bee5639d7aee3b703618dec3fc2ce13.png)
∴△ABC≌△DEF( )
![](https://img.xkw.com/dksih/QBM/2021/10/19/2832490866556928/2842476396535808/STEM/07f9443e-3c60-4921-b8be-7163abed17d1.png)
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