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3 tháng 11 2016
  • Dịch: Có bao nhiều đường chéo mà một đa giác 36 cạnh có.

Công thức tính số đường chéo : \(\frac{n\left(n-3\right)}{2}\) trong đó n là số cạnh của đa giác.

Cách chứng minh ( tham khảo bên web khác ):

Tại đây. Từ đó đáp án là :  \(\frac{36.33}{2}=594\)

  • Vậy ...
V. Arrange the words into the sentences (2ms) 1. want/ Tom/ Mary/ and/ glasses/ two/ of/ water. .................................................................... 2. sister/ my/ going/ is/ to/ live/ country/ the/ in. ................................................................. 3. going/ dinner/ tonight/ is/ have/ to/ where/ Lan? .................................................................... 4. the/ spring/ in/ what/ weather/ is/ like/...
Đọc tiếp

V. Arrange the words into the sentences (2ms)

1. want/ Tom/ Mary/ and/ glasses/ two/ of/ water.

....................................................................

2. sister/ my/ going/ is/ to/ live/ country/ the/ in.

.................................................................

3. going/ dinner/ tonight/ is/ have/ to/ where/ Lan?

....................................................................

4. the/ spring/ in/ what/ weather/ is/ like/ the?

.........................................................................

5. building/ tallest/ the/ is/ this/ city/ the/ in/ world.

...........................................................................

6. Lan's house/ smaller/ is/ house/ my/ than.

....................................................................

7. she/ never/ with/ camping/ goes/ her/ friends.

.....................................................................

8. often/ she/ go/ does/ how/ cinema/ to/ the?

....................................................................

2

♋Song♋ bài nào mk lm đc mk sẽ lm

cái này tầm lớp 6 thôi mà bn

9 tháng 10 2016

There are five.  

(Free!)

9 tháng 10 2016

there are five fingers in my hand

Choose the correct word marked A,B, or C to fill each blank in the following passage.(Why)There are many reasons (1) ____ it is important to have a hobby. First of all, a hobby can be a remedy for your (2) ____. Because it is the activity you choose for yourself, it will always give you pleasure and (3) ____ you relax. Even if you just spend a little time enjoying your hobby, you can see the difference (4) ____ your spirit. Second, some hobbies can also (5) ____ you financially. Many old people...
Đọc tiếp

Choose the correct word marked A,B, or C to fill each blank in the following passage.(Why)

There are many reasons (1) ____ it is important to have a hobby. First of all, a hobby can be a remedy for your (2) ____. Because it is the activity you choose for yourself, it will always give you pleasure and (3) ____ you relax. Even if you just spend a little time enjoying your hobby, you can see the difference (4) ____ your spirit. Second, some hobbies can also (5) ____ you financially. Many old people enjoy gardening. They grow a lot of trees and vegertable, so they can sell them for some money. In (6) ____, a hobby can help you connect with other people. If you like colecting stamps, you can (7) ____ a stamp club to share your albums with other collectors. If your hobby is caving eggshells, you can give your products to your friends (8) ____ gifts.

1. A.for B. why C.because

2. A.happiness B.pain C.tiredness

3. A.help B. have C. do

4. A. for B. in C. on

5. A.harm B.give C.benefit

6. A. addition B. general C.conclusion

7. A.take part B.go C. join

8. A. like B.as C.for

2
17 tháng 9 2018

1.a

2.c

3.a

4.b

5.c

6.a

7.c

8.b

17 tháng 9 2018

Cho mình sorry. 

1.b mới đúng!!!

2 tháng 2 2017

12 nha ban

11 tháng 2 2017

12 nha 

12 tháng 11 2015

Does your school have many classes ?

18 tháng 12 2016

9 nha các đồng bào

18 tháng 12 2016

10 divided by 9, quotient 1 remainder 1

20 divided by 9, quotient 2 remainder 2

30 divided by 9, quotient 3 remainder 3

...

90 divided by 9, quotient 9 remainder 9

there are 9 numbers

8 tháng 1 2022

Ủa sao toàn tiếng Anh vậy

15 tháng 6 2016

 Minh moi hoc lop 5 thoi. Hong biet co dung ko . Minh doan la 360 do. Sai thi thoi nhe

11 tháng 11 2017

mình nghĩ là 720