Method 1: Let the number of sides of this polygon be x 。
180(X-2)= 120X
60 = 360 times
x=6
The number of sides of this polygon is 6.
Method 2: Because each internal angle is 120, the external angle corresponding to each internal angle is 60.
According to the fact that the outer angle of any triangle is 360 and one side corresponds to an angle,
The number of sides is: 360÷60=6
The number of sides of this polygon is 6.
(2) Let this polygon be an N-sided polygon, which can be obtained according to the meaning of the question.
(n-2)× 180=360
The solution is n=4.
A: This polygon is a quadrilateral.
My hometown
Welcome to my hometown! My hometown is Guangzhou. It is winter now, but it is not very cold. The weather is always sunny. Sometimes it rains.
On weekends, people like to go to the park for leisure and entertainment, and sing, dance and play volleyball together.
Have time to rewrite!
(3) When we were born, we opened our eyes and looked at the people and things around us with curious eyes, and we opened the door to learning! We babble like children. After that, we entered the school and began to learn scientific and cultural knowledge systematically, knowing that only by constantly learning and enriching ourselves can we survive in a highly competitive society. A person who meditates all day and all night is not as rewarding as a moment's study. Learning should be able to learn from each other's strengths and make good use of the help of learning to make up for their own shortcomings. Learning is an endless road, as the teacher said, learning less is like sunrise; Strong and eager to learn, such as the light of Japan and China; Old and studious, bright as a candle. It can be seen that if you are used to learning so brightly, you should seize the opportunity and try to learn more knowledge. A person's life is spent in constant learning and accumulation. It is also a busy life, and as a result, some people have accomplished nothing; While others are fruitful. These are inseparable from the learning attitude. Learning is expensive. As long as you keep studying, all problems will be solved. There is a poetic soul in the abdomen and a scientific strategy in the chest. You can't "crowd out" learning because of games. You must really understand that only by studying first and arming your mind can you have knowledge. But diligent study is the right way!
Remember, the composition is actually written for only one person. Don't write an argumentative essay, as if you were arguing with someone. Speak out confidently and bravely, and the teacher will not be impressed by your talent, but also by your courage.
Good luck!