Are equilateral triangles and squares axisymmetric figures? How many axes do they have

All of them
There are three equilateral triangles
There are eight squares

Mathematician's story is less than 50 words
hurry up

The epitaph of mathematicians some mathematicians devoted themselves to mathematics before they died. On their tombstone after they died, they engraved marks representing their life achievements. After Archimedes, an ancient Greek scholar, died in the hands of Roman enemy soldiers who attacked Sicily (before he died, he still said: "don't break my circle"), people commemorated him on his tombstone

The idiom (more than five) used to describe the fierce competition scene of the sports meeting

Amount················
Take a look··········
as cheerful as a lark
jaleo
Flags flying
every minute counts
make concerted efforts
Work together to help
have the same enemy and hatred
share sb.'s joys and sorrows
to pull together in times of trouble
unite in a concerted effort
stand together through storm and stress
come together through thick and thin
work together with one heart
work and pull together
invincible
And... And... And... And, um ~ in full swing? Sorry, I can only think so much, er, can I offer you a reward?

The story about mathematicians is less than 50 words

Hua Luogeng, a famous mathematician in our country, had only been in junior high school. Because of his poverty, he dropped out of junior high school to do business in his own small grocery store, selling cigarettes, needles and thread. However, he still couldn't put down mathematics. Even though he later suffered from typhoid fever and had a lifelong disability in his left foot, he still didn't stop studying mathematics because of his illness. With unremitting diligence, he finally became a world-famous mathematician

Please tell me the object of rotation and translation

Rotation: electric fan, car wheel, windmill, etc
Translation: car driving on the road, box pushing, etc

Mathematician's story 50 words
No more than 50
That's why I said that

The story of mathematician Gauss as a child
From one to one hundred
Gauss has many interesting stories. The first-hand information of the story often comes from Gauss himself, because he always likes to talk about his childhood in his old age. We may doubt the truth of the story, but many people have confirmed his story
Gauss's father works as the foreman of the clay tile factory. He always pays the workers every Saturday. In the summer when Gauss was three years old, when he was about to pay his salary, young Gauss stood up and said, "Dad, you're wrong." then he said another number. It turned out that young Gauss, three years old, was lying on the floor, He has been secretly following his father to calculate who should be paid how much. The result of recalculation proves that little Gauss is right, which makes the adults standing there dumbfounded
Gauss often said with a smile that he had learned to calculate before he learned to speak, and that he learned to read books after he asked adults how to pronounce letters
At the age of seven, Gauss entered the University St.Catherine When they were about ten years old, the teacher had a problem in the arithmetic class: "write down the integers from 1 to 100, and then add them up!" every time they had an exam, they had the following habit: the first one they finished was to put the slate face down on the teacher's desk, The second one is to put the stones on the first one and fall one by one. Of course, this problem is hard for those who have learned arithmetic progression, but these children are just beginning to learn arithmetic! The teacher thought he could have a rest. But he was wrong, because Gauss had put the stones on the desk in a few seconds, At the same time, he said, "here's the answer!" the other students added up the numbers one by one, and their brows were sweating. But Gauss sat quietly and didn't care about the teacher's scornful and suspicious eyes. After the exam, the teacher checked the slate one by one. Most of them made mistakes, and the students were whipped. Finally, Gauss's slate was turned over, There is only one number above: 5050 (needless to say, this is the correct answer.) the teacher was surprised, and Gauss explained how he found the answer: 1 + 100 = 101, 2 + 99 = 101, 3 + 98 = 101 So the answer is 50 × 101 = 5050. It can be seen that Gauss found the symmetry of arithmetic progression, and then just like the process of getting the sum of general arithmetic progression, put the numbers together

Some examples are given to illustrate the application of the linear propagation of light in life

It is right that light propagates along a straight line in the same homogeneous medium
1. Pinhole imaging (the light of a candle passes through a small hole to form an inverted image in a dark room)
2. Sunshade
3. When standing in line, only one person in front means that the team is in line
4. The formation of shadow
5. Laser accuracy (used in road repair)
Shadow,
The sunlight from the small hole,
Solar and lunar eclipses,
Aim at three points and one line
The beam of the searchlight,
The setting sun shines through the crevices of the clouds,

Mathematician's story, within 50 words

One day, when Chen Jingrun was having lunch, he felt his head. Oh, his hair was too long. He should have a haircut. Otherwise, when people saw him, he thought he was an aunt. So, he put down his job and went to the barber shop

Examples of acid-base neutralization reaction in production and life

Absorption of SO2 by ammonia in sulfuric acid industry
Al (OH) 3 is used to treat gastric acid
If it's useful, give it the best. It's not easy to get it in the middle of the night

Mathematician's story 100 words

Hua Luogeng once went out of the city to play with his neighbor's children. As they were walking, they suddenly saw a wasteland grave beside the road. There were many stone men and stone horses beside the grave. This immediately aroused Hua Luogeng's curiosity. He wanted to see what happened. So he said to his neighbor's children, "there may be fun there. We used to

Are equilateral triangles and squares axisymmetric figures? How many axes do they have