Zhang Jingtao was speechless. He couldn't even understand such simple logic. The consequences of reading Confucian books since childhood were really terrible. The Confucian culture and Confucian mathematics were all called to be realistic and logical every day. In fact, when encountering specific problems, he couldn't even think of the simplest logic. Even Wei Yuanzi, who has a high IQ, was like this, which made people sigh secretly.

Zhang Jingtao had no choice but to say: "The so-called same coefficient should of course be viewed as the benchmark. Haven't you ever thought that if they all use diameter as the benchmark, in fact, are pi and circle area ratio different? Although the pi is 3.2, the circle area ratio is actually 0.8! But they share a Chinese symbol π!"

With a loud bang, there was no doubt that the people by the West Lake were finally willing to start their brains.

And as long as you have studied Chinese mathematics, you will immediately find that this is true.

Even if you use the nonsense number 3.1415926..., you will get a ratio of nearly 0.8.

As for whether π is a Chinese symbol, if anyone questioned it, Zhang Jingtao would immediately tell him how π came from.

Lilibai finally couldn't help it and said, "This sounds reasonable, but there is no evidence!"

Zhang Jingtao said aloud: "I have already said: Zhang, bit, and ye have all contained the mystery of pi. Zhang and Ye have already said it, and the remaining bit is evidence! It represents the accurate value of 3.2 of Zhang rate! My Chinese text is so exquisite!"

Everyone believed it. This time, Lilibai didn't have to question it, and many people came to question it.

Under the turmoil of the crowd, Zhang Jingtao was not panicked at all and smiled and said, "Don't be impatient. Listen to Yu's words, divide it into eight swords. These eight characters are from molds, just like the roof of the herringbone is divided into two halves. They have a meaning of separation, and are engraved and divided by a knife. Furthermore, the word eight naturally has the meaning of the number 8. For this reason, dividing this character actually contains the meaning of eight in things."

As for the eight-point part that Zhang Jingtao said, that is, eight-point part, it is just a word that divides the temperature. For this reason, it has the meaning of horizontally dividing it into small parts. For this reason, the document usually says part.

It can even be said that parting is a word that can do everything. With parting words, it can replace everything.

When everyone heard this, even so, what does this eight-point have to do with pi?

What about 3.2? It doesn’t matter.

However, the relationship between this is too big.

Zhang Jingtao said in a questioning voice: "Don't worry, if I tell you that eight minutes means that the area of ​​a circle is eight minutes in the outer part of the circle, then you will understand why this word contains the word "生游戏!"

Suddenly, there was a silence around me, and everyone who knew how to arithmetic would have to do it.

Yes, eight points.

Eight out of ten.

What is the circle area ratio? In fact, it means that in an outer square formed by the diameter of a circle, the area ratio of the circle occupies in the square.

This ratio is actually 0.8 of the square of the diameter, which is eight points.

Just like the so-called half liang coins in Zhang Jingtao's hand, also called Wuzhu coins, its diameter is 2.5 cm.

Then, if this diameter is used to form a large square with the outer edge of a circle, the area of ​​this square is 2.5 times 2.5, that is, 6.25 square centimeters.

Then, the eight-point of 6.25 is the area of ​​the circle, which is 5 square centimeters.

This is exactly the mystery contained in the five words of Wuzhu coins! Its area is 5!

This is also the reason why pi is called pi. In order to use a coefficient to the area of ​​the circle and the circumference, Ah He used a formula to borrow it. Therefore, although pi could be called pi, it can only be called pi after it becomes π, but it can only be called arch length, which is the flap rate.

"Just like my fan." With a swish, Zhang Jingtao opened the folding fan in his hand, shook it lightly, and smiled lightly like a hermit, before explaining again.

Indeed, only Chinese fans made of bamboo and paper have always been available. The bamboo, paper, and the fan that represents pi fully demonstrate that the only civilization of mankind comes from China.

Because when calculating the area of ​​the circle, Guanyin Empress was very clever and changed her usage.

This usage is to divide the area of ​​the circle into four parts to calculate, so what needs to be calculated is one quarter of the circle, which is a fan.

The coefficient of the fan is the proportion of the fan surface in the small square of one quarter of the outer area formed in the circle diameter, and the positive fan surface of the small square of one quarter of the outer area formed in the circle diameter.

Of course, this coefficient is also 0.8!

If we take the diameter of the ancient coin in Zhang Jingtao's hand as an example, then its radius is 1.25, and the side length of a small square of the outer square formed by the diameter of this circle is of course 1.25.

So: 1.25 times 1.25 times 0.8 = 1.25 square centimeters.

It is the area of ​​this fan.

Regardless of the radius and area of ​​this fan, the number obtained is very interesting, and the radius and area of ​​the fan are exactly the same.

Just to say, these four fan planes form a perfect circle.

Therefore, the formula for the area of ​​the circle is: 0.8*4*1.25*1.25, that is, the square of the radius of the circle, which is exactly 5 square centimeters.

That's how 3.2 is the general flatrate π.

In addition, if you look closely at these numbers, you will find that the circle area of ​​Wuzhu coins is 5 square centimeters, and the edge length of a coin hole in the middle is 1 cm, so its area is undoubtedly 1 square centimeter, accounting for one fifth of the area of ​​the circle.

In this way, it can be seen that the area of ​​the circle can be divided into equal five parts and can also be transformed into 5 small squares.

Then, this gives you an interesting Zhang Jingtao's mathematical theorem 1, that is: the radius of any circle, divided by 5, multiplied by 4, and squared, you can get one fifth of the area of ​​the circle.

Square*5 of (Circle Radius*0.8) = Circle Area

In this way, Zhang Jingtao's Theorem 2 can be obtained, that is, if you want to intuitively find the side length of a small square composed of one-fifth of the circle area in the center of the circle, then as long as: the circle radius * 0.8

"π? Haha, this is a symbol invented by our Druids!" Lilibai finally came to provoke.

Zhang Jingtao smiled: "π is the turn of the character "bow", and it is also the lower part of the character "light". In other words, when using this symbol, the Chinese can get the result of light and shadow without sightseeing. They mean that they can accurately obtain the scale of time division and can already make clocks. For this reason, they turn into words, that is, Wushu's character "wushu," using Wuqima black Wuyin. For this reason, Zhang Shu also has a name, also called: Fen Rate! Because it can represent the "Fen Rate" of time! Do you dare to say it is a symbol of the Druid?"

"This... the clock was invented by us Druids." Although Lilibai argued strongly, she looked helpless, and she didn't want to get it all related.

Of course, Zhang Jingtao had to fight back against this remark and said disdainfully: "Princess Lili Bai, those who use 3.1415926... after such unstable numbers, who cannot even accurately count the numbers of minutes, and those who cannot even count the numbers of seconds, can invent watches? Are you funny?"

This is like the cultural tribe who did not know that the pi truth value was 3.2 in the 21st century, and did not know how to obtain the cultural tribe who did not master the time calculation. Will there be civilization?

From this we can see that there is no doubt that Jehovah is the only civilization of mankind!

Yes, it represents astronomy, harmony, agriculture, water conservancy, China, fire smelting, summer, and the festival is determined.

Lili rolled her eyes, but smiled proudly and said, "Even so, is the score rate of 3.2 very stable? Can it be used for 60 points? Let's do it!"

So, everyone had calculated and questioned it.

Because if the diameter is 2.5 and the circumference is the diameter multiplied by the longbow ratio 3.2, then the result is 8!

Although this is exactly the circumference of the 2.5 cm coin, and it is another mystery that the word "就" contains the number 8, the problem is that if this 8 is divided by 60, the result is 0.13333333...infinite loop!

So, how can this be accurate to the time, minutes and seconds?

Zhang Jingtao was not panicked and said with a smile: "0.13333333... Such numbers are not unstable numbers like 3.1415926, which are known as infinite and non-circulating, but a very regular and stable number, which means that circles can be infinitely subdivided, expanded, and subdivided indefinitely, but in fact they can be equally divided by any number."
Chapter completed!