Question

数学证明题，看一下，，，，

Answer 1

全等
证明
∵ △OAB是等边三角形
∴OB=OA ∠OBA=60°
∵ △BCD是等边三角形
∴BC=BD ∠CBD=60°
∵∠OBA+∠ABC=∠OBC，
∠CBD+∠ABC=∠ABD，
∠OBA=∠CBD，
∴∠OBC=∠ABD
∵OB=OA，∠OBC=∠ABD，BC=BD
∴ △OBC全等于△ABD

纯手打 采纳吧！

追问

谢谢，

可以再看一题吗

谢谢了

追答

加我QQ397341431

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干什么啊

追答

语音快一点 手打太慢

追问

这条题目你会写吗

追答

第一问 太简单 第二问 我知道答案 还在思考过程

追问

教一下，谢谢了，，，(^0^)

第1问，怎么写

哈

追答

在直角三角形中 斜边的中线等于斜边的一般 △BDC中 DE=FC △BCE中EF=BF BF=FC ∴EF=DF

追问

哦，第2问呢

追答

第二问 等腰直角三角形

∠FBE=∠BEF,∠FCD=∠FDC, ∠FBE+∠FCD=180°-∠A

△BEF内角和+△FDC内角和=360°
∠EFB+∠CFD=360°-（ ∠FBE+∠BEF+∠FCD+∠FDC）=360°-2（180°-∠A）=90°

∠EFD+∠EFB+∠CFD=180° 所以∠EFD=90° 而 EF=DF 所以它是等腰直角三角形

采纳 采纳啊！

追问

谢谢哈，第3问因该怎么证明呢，

追答

采纳 再说 我还在考虑 过程

追问

好，你要给答案哦

追答

等会 我还在想过程 我能直接推出答案 但是证明过程还在想

Answer 2

做这题拿手！

追答

先好评吧

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怎么做

追答

好评

追问

做出来必定给好评

你不会就别装了，直接说要好评得了。你这种人我在这里见得多了，要完好评就失踪了

对吧

根本没有答案，

既然拿手，那你给答案啊

如果你明天没有答案，我就举报你，还有，已经有人解答了，如果你有答案（当然了，你怎么可能有）不许和那个人的解答过程一样，不然我仍然会举报你

没有答案吧，你不是说拿手吗，

哈 答案呢，

怎么不回呢了

等你答案呢

追答

呵呵嘿

没时间跟你这笨蛋墨迹！！

追问

嗯，其实我很满意，很满意看到一个如此

bitch

do you know,you just a bitch

追答

拽！you too~

追问

Haven't seen you so cheeky like a man, you are the first

Yo, also will be English, continue to ah,

Don't stop, continue to drag

See you to what time, just know oneself is a what kind of person

What kind of person he is, you don't know, want me to tell you bitch

Continue to drag ah, you don't look up words in the one by one what is the meaning of it, ask me, I can tell you, bitch, don't beg me, ha, you slowly check, know what does it mean to talk to me again,

go on

keep on saying

Is ah, afraid to see, or don't want to one by one slowly up the dictionary? Good pity you oh, pity, nobody want to children,

bitch

Don't speak kazakhstan's the matter, or can't bitch admitted that he is? I knew, such people like you, there is no upbringing, fuck. For you and your mother will be ashamed of.

Come to a decision so pleasant

If you didn't answer, I even if your default my point of view, then you are a pig or a dog as nonhuman. I fuck your family.

If you didn't answer, I even if your default my point of view, then you are a pig or a dog as nonhuman. I fuck your family.