lamlàm dùm mik vs
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Bài 2:
Áp dụng định lí Pytago vào ΔEFG vuông tại E, ta được:
\(FG^2=EF^2+EG^2\)
\(\Leftrightarrow FG^2=15^2+5^2=250\)
hay \(FG=5\sqrt{10}\left(cm\right)\)
One of the biggest environmental impacts of human activities is air pollution
1 were
2 was
3 Were
4 was
5 was
6 was
7 was
B
1 John could play the piano when he was 6
2 My brother could draw beautiful picture when he was seven
3 We could speak 2 foreign languages when we were 18
4 She could dance when she was 8
5 Tiger Woods could play goft when he was 3
C
2 Could you write you name when you were 3
3 Could you read when you were 2
4 Could you count from 1 to 10 when you were 2
5 Could you talk when you were 3
6 Could you ride a bike when you were 6
7 Could you swim when you were 5
A.
1. were
2. was
3. weren't
4. was
5. was
6. was
7. wasn't
B.
2. John could play the piano when he was six.
3. My brother could draw beautiful pictures when he was seven.
4. We could speak two foreign languages when we were eighteen.
5. She could dance when she was eight.
6. Tiger Woods could play golf when he was three.
C.
2. Could you write your name when you were three?
3. Could you read when you were two?
4. Could you count from one to ten when you were two?
5. Could you talk when your were three?
6. Could you ride a bike when you were six?
7. Could you swim when you were five?
a: Xét ΔADC và ΔEDB có
DA=DE
\(\widehat{ADC}=\widehat{EDB}\)
DC=DB
Do đó: ΔADC=ΔEDB
2:
a: Các đơn thức đồng dạng là \(2.5xy^3;-2xy^3\)
b: Các đơn thức đồng dạng là \(2013;3,6\)
\(-0.7x^3y^2;y^2\cdot x^3\)
c: Các đơn thức đồng dạng là \(10x^2yz;25yx^2z\)
\(-8xy^2z^2;z^2xy^2\)
a) Các đơn thức đồng dạng là:
\(2,5xy^3\) và \(-2xy^3\)
b) Các đơn thức của đồng dạng:
\(-0,7x^3y^2\) và \(y^2\cdot x^3\)
\(3,6\) và \(2013\)
c) Các đơn thứ đồng dạng là:
\(-8xy^2z^2\) và \(z^2xy^2\)
\(10x^2yz\) và \(25yx^2z\)
1..so I tired
2..I tried my best
3.. the most beautiful place in the world
4..tease the dog
1The children are playing football at the moment
2I haven't met Lan for a long time
Ảnh 1:
1. I stayed up late, so I am tired
2. I did not pass my exam although I tried my best
3. My homeland is the best beautiful place in the world
4. Don't tease the dog
chuyển tất cả"to be " thành phủ đỉnh
WE ARE NOT STUDENTS
HER DOCTOR IS NOT GOOD
HE IS NOT SICK
THEY ARE NOT BOYS
IT IS NOT A CHAIR
YOU ARE NOT HANDSOME
THEIR STUDENTS ARE NOT NICE
SHE IS NOT IN HA LONG BAY
I AM NOT A DOCTOR
HIS CAT IS NOT FAT