A K D C B Cho hình vẽ: tìm tam giác bằng nhau trên hình vẽ. ...
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CC
4
1 tháng 8 2018
Ta có: \(\frac{x}{y}=\frac{5}{7}\)
\(\Rightarrow\frac{x}{5}=\frac{y}{7}\)
Áp dụng tính chất dãy tỉ số bằng nhau ta có:
\(\frac{x}{5}=\frac{y}{7}=\frac{a+b}{5+7}=\frac{72}{12}=6\)
\(\Rightarrow\hept{\begin{cases}\frac{x}{5}=6\Rightarrow x=30\\\frac{y}{7}=6\Rightarrow y=42\end{cases}}\)
Vậy \(x=30;y=42\)
NH
3
HT
23 tháng 11 2020
1.I saw/ have seen that flim aready
2 we went / have gone to the movies three times last month
3 did you ever do / have you ever done volunteer work ?
4 i had / have had five tests so far this semester
5 linda did / has done her homework before she went to sleep
6 she bought / has bought a neww mobile phone two days ago
23 tháng 11 2020
1.I saw/ have seen that flim aready
2 we went / have gone to the movies three times last month
3 did you ever do / have you ever done volunteer work ?
4 i had / have had five tests so far this semester
5 linda did / has done her homework before she went to sleep
6 she bought / has bought a neww mobile phone two days ago
KD
0
24 tháng 11 2020
5. She took _____ playing the piano when she was a young girl
A. in
B. over
C. up
D. on
6. ___________ is her father’s hobby. He s going to the zoo to see beautiful parrots or canaries.
A. Collecting birds
B. Bird - watching
C. Raising pets
D. Arranging flowers
7. It’s interesting ______ a puppy. I enjoy _____ after it very much.
A. having/ looking
B. having/ to look
C. to have/ to look
D. to have/ looking
8. One of my favorite hobbies is ______ comics. I love _______ more famous ones.
A. read/ collecting
B. reading/ collecting
C. to read/ to collect
D. reading/ collected
9. The bus ______ in two minutes. I _____ late for school when I _____ it.
A. arrives/ will be/ miss
B. will arrive/ will be/ miss
C. arrives/ am/ will miss
D. will arrive/ am/ will miss
10. I love making ___________ because I can create some nice and unique clay bottles or cups to give my friends.
A. pottery
B. paper kites
C. architectures
D. lanterns
TT
25 tháng 11 2020
5. She took _____ playing the piano when she was a young girl
A. in
B. over
C. up
D. on
6. ___________ is her father’s hobby. He s going to the zoo to see beautiful parrots or canaries.
A. Collecting birds
B. Bird - watching
C. Raising pets
D. Arranging flowers
7. It’s interesting ______ a puppy. I enjoy _____ after it very much.
A. having/ looking
B. having/ to look
C. to have/ to look
D. to have/ looking
8. One of my favorite hobbies is ______ comics. I love _______ more famous ones.
A. read/ collecting
B. reading/ collecting
C. to read/ to collect
D. reading/ collected
9. The bus ______ in two minutes. I _____ late for school when I _____ it.
A. arrives/ will be/ miss
B. will arrive/ will be/ miss
C. arrives/ am/ will miss
D. will arrive/ am/ will miss
10. I love making ___________ because I can create some nice and unique clay bottles or cups to give my friends.
A. pottery
B. paper kites
C. architectures
D. lanterns