HOC24
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Chủ đề / Chương
Bài học
Reorder the words to make the sentences:
1. grow/ what/ do/ up/ you/ will/ you/ when/?/
=> What will you do when you grow up?
2. will/ system/what/ in/ like/ our/ transport/ look/ the/ future/?/
=> What will our transport system look like in the future?
3. solar/ popular/ will/ in/ energy/ be/ 2020/?/
=> Will solar energy be popular in 2020?
4. transport/ most/ in/ which/ the/ be/ will/ popular/ future/?/
=> Which transport will be the most popular in the future?
5. solve/ we/ energy/ of/ problem/ the/ by/ solar/ shortage/ energy/ will/ using?/
=> Will we solve the problem of shortage energy by using solar energy?
a) \(\Delta AMC\) và \(\Delta DMB\) có: AM = MD (gt) \(\widehat{BMD}\) = \(\widehat{AMC}\) (hai góc đối đỉnh) BM = MC (AM là đường trung tuyến) \(\Rightarrow\Delta AMC\) = \(\Delta DMB\) (c.g.c) \(\Rightarrow\) \(\widehat{MAC}\) = \(\widehat{MDB}\) (hai góc tương ứng) \(\Rightarrow\) AC // BD, mà AC \(\perp\) AB (\(\Delta ABC\) vuông tại A) \(\Rightarrow\) BD \(\perp\) AB \(\Rightarrow\)\(\Delta ABD\) vuông tại B.
b) Hai tam giác vuông ABC và ABD có: AB là cạnh chung AC = BD (\(\Delta AMC\) = \(\Delta DMB\)) \(\Rightarrow\) \(\Delta ABC\) = \(\Delta ABD\) (hai cạnh góc vuông)
Keep your money in a safe place
ngoại tỉ: -5,1; -1,15 | trung tỉ: 8,5; 0,69
ngoại tỉ: -0,375; 8,47 | trung tỉ: 0,875; -3,63