Mathematics story about circle From 100 words to 180 words, don't cut the long one, but cut it again, Come on, before 1:00 Average + 5 points

Mathematics story about circle From 100 words to 180 words, don't cut the long one, but cut it again, Come on, before 1:00 Average + 5 points

Xiao Ming asked: why is the wheel round? Xiao Qiang drew a circle with a compass and said: "we measure the distance from any point on the circle to the center of the circle and find that they are all equal. This is called radius. The wheel is made into a circle, and the axle is set at the center of the circle. The distance between the axle and the ground is always equal to the radius of the wheel, so that the wheel can roll smoothly on the ground, The distance from the rim to the center of the circle is not equal. When the car goes up, it will vibrate up and down. Therefore, the wheels are round. "After that, Xiao Ming understood. He said with deep feeling:" it seems that mathematics is indispensable everywhere! "

About 100 words of math story
It's urgent

Butterfly Effect
Lorenz, a meteorologist, presented a paper called "can a butterfly flap its wings to cause a tornado in Taxas?" which discusses that if the initial conditions of a system are a little poor, the result will be very unstable. He jokingly called this phenomenon "Butterfly Effect". It's like we roll dice twice, no matter how deliberately we do it, The two physical phenomena and the number of points cast are not necessarily the same. Why did Lorenz write this paper?
This story takes place in the winter of 1961. He usually operates a weather computer in his office. Usually, he only needs to input meteorological data such as temperature, humidity and pressure, and the computer will calculate the possible meteorological data at the next moment according to three built-in differential equations, so as to simulate the weather change map

70 word math story
It's the second volume of the fifth grade

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