I'm only seven years old, Lao Zhu, you let me supervise the country?

Chapter 307 The Uses of Geometry!A new era of war!

"Arithmetic useless?"

Zhu Yunxuan burst out laughing, and Fang Xiaoru's face turned pale as he laughed.

As if laughing at him, that's all he has is intelligence!

He didn't understand why Zhu Yunzhen could smile like this. It was clear that the person who had the advantage at this moment was Fang Xiaoru!

But Zhu Yunzhen just laughed.

And he said without mercy: "That's how you see it!"

Zhu Yunzhen finally started to fight back.

One by one, he pointed out the mistakes of Fang Xiaoru and others.

Said: "Arithmetic is never useless. Arithmetic is a practical knowledge!"

"Historical records say that the requirements of the most sage teachers for benevolent gentlemen are to 'aspire to Taoism, base themselves on virtue, rely on benevolence, and practice art'."

"And the art in this refers to the six arts of a gentleman!"

"Etiquette, music, archery, charioteering, calligraphy, and numeracy are among them! Don't you, Fang Xiaoru, think that the sage master is also wrong?!"

"Joining the army to change, there are so many intricate things, even the most sage master once asked for the method of deduction!"

"How virtuous and capable are you, a filial child, that you dare to say these four words: arithmetic is useless? Could it be that you are really reading Zhu Xi's books, and you have become stupid while reading, and have forgotten the teachings of the sage!"

"Or do you think Zhu Xi is better than the Holy Master in your heart?!"

Zhu Yunxuan shouted loudly.

Like thunder in the ears.

Fang Xiaoru was so frightened that she broke into a cold sweat!He looked so flustered!
He never thought that Zhu Yunzhen would use this method to fight back against him.

Indeed, Cheng-Zhu Neo-Confucianism, as a moral Zen school, extremely neglected the Tao of Numbers.

After all, both Cheng and Zhu Neo-Confucianism emphasized knowledge over practice.

How could he possibly care about the Six Arts of Gentlemen? These are all old things from who knows how many years ago.

Not sought after by the world.

Of course, the main reason is that it’s too difficult. It’s too late for everyone to learn Eight-legged Literary Literature to take the imperial examination and become an official. Who would learn these useless things?

Therefore, in the minds of Fang Xiaoru and others, arithmetic is useless, so it is right to take it seriously!

It’s what’s in their hearts!
But now after being criticized by Zhu Yunzhen using Confucius' words, Fang Xiaoru suddenly froze.

Still for that reason.

Neo-Confucianism is not Confucianism at all, and is far from Confucius’ thoughts!

It is completely based on the thoughts of Confucius to explain his own thoughts. The Four Books and Five Classics of Neo-Confucianism seem to be inherited by Confucius.

But in fact, it is all the words of Zhu Xi and his family!

It can even be said that it is a brand new knowledge.

It's just that the word 'Confucianism' is used in name.

So when Zhu Yunzhen used Confucius' thoughts to criticize Fang Xiaoru's words and deeds, he was naturally embarrassed.

I can only hesitate and talk about him.

Said: "Don't, don't try to use your words!"

"Say something useful?"

Zhu Yunxuan did not insist on this point, because most of the civil servants present knew that the reason why Confucius wanted gentlemen to learn mathematics was because of "Yi".

Mainly used for fortune telling and divination.

But now it's the Ming Dynasty. Although fortune-telling still exists and is active among the people, it has long ceased to be popular in the court.

In other words, it is indeed useless.

Zhu Yunzhen knew that if he wanted to truly convince them, or convince Lao Zhu, he had to come up with something truly useful!

"There are so many things that can be used in arithmetic."

Zhu Yunxuan said calmly: "But today, I will only pick up one or two of them, so that you can see whether arithmetic is really useless!"

"Today, I will only talk about two things, one of which is geometry!"

"The usefulness of geometry is very broad, ranging from measuring the area of ​​​​fields to measuring the mountains and rivers of our country!"

"You can build magnificent tall buildings from below, and you can observe the stars of all things from above!"

"And this is the useless arithmetic you talk about!"

Fang Xiaoru and others were stunned for a moment.

It can even be said to be a bit dumbfounded.

It's not like they haven't read "Elementary Mathematics" written by Zhu Yunxuan. The geometry part is really difficult to understand, and they really didn't understand it.

However, isn’t this geometry just some simple shapes on paper?
How is it connected to these things?

Fang Xiaoru's first reaction was that Zhu Yunzhen was lying to him!

He said angrily: "How is this possible!"

"The content about geometry in your "Elementary Mathematics" is only a few dozen pages. How can it contain so much content?"

"And I obviously saw it!"

"There's nothing in it!"

But Fang Xiaoru only received Zhu Yunzhen's pitiful eyes.

"Tsk tsk."

As if he was mocking him, his intelligence was really limited and he couldn't understand anything.

The feeling of being intellectually despised is really maddening to the extreme!
"Fang Jijiu, if I were you, I would first understand geometry and then come here to talk nonsense."

"Rather than just saying that arithmetic is useless if you don't understand it half-heartedly!"

"I would kindly like to tell you today the true beauty of geometry!"

Zhu Yunzhen smiled disdainfully.

Then he explained the knowledge of geometry to everyone, especially about how to accurately measure irregular fields when the government measured fields.

In the past, when Ming officials encountered such irregular fields, they could only rely on estimates.

Use your eyes to compare.

But now, Zhu Yunxuan can easily calculate the area of ​​irregular land!
For the government, this obviously saves a lot of trouble!

On a larger level, Zhu Yunzhen teaches everyone how to accurately draw accurate maps of equal proportions, and how to use geometric knowledge to build tall buildings without collapsing.

How to use geometric knowledge to measure celestial bodies.

All they used were simple contents of "Elementary Mathematics", although for Fang Xiaoru and others, it was already considered advanced.

But it's not that difficult to understand.At least I can vaguely understand and understand what Zhu Yunzhen is talking about.

Lao Zhu above was also slowly waking up.

These things are all subtle and can change everything about Ming Dynasty from the most basic level.

It's like laying a new foundation on the original solid foundation.

Become more solid!

Enough to raise a building ten thousand feet tall!
At this time, Lao Zhu just vaguely understood Zhu Yunzhen's true intention of doing all this!

If the Ming Dynasty is like a tall building.

Although it looks solid now.

But the foundation is not strong, and after decades or centuries, the building will naturally collapse.

But what Zhu Yunzhen is doing now is to replace it with a stronger foundation.

Stronger materials were used.

Renovate all the lowest level of thinking!

Only in this way can we jump from a tall building to a height of more than a hundred feet, and it will remain unchanged for thousands of years and ten thousand years!
Be here for a long time!

"The second one is function!"

After finishing talking about geometry.

Zhu Yunxuan talked about functions again. In the eyes of Fang Xiaoru and others, these are nothing more than some numbers, playing a lot of tricks on paper.

Almost a word play.

Even if he juggled these numbers on paper, it wouldn't be useful!
But what Zhu Yunzhen said next.

But it really broke through Fang Xiaoru's defense!

"Everyone must have known about the power of artillery. In the future, the artillery of the Ming Dynasty will only become more powerful!"

"But I want to really unleash the power of the artillery."

"But you can't do without functions!"

Inside Fengtian Temple.

Everyone looked at Zhu Yunzhen, looked at him, listened to him, and talked.

It tells how artillerymen who fired artillery used trigonometric functions to determine the target's orientation and distance during the war.

And when firing horizontally and upward, how to use the principle of parabola to determine the impact point of the artillery shell.

Accurate bombardment of targets!
Every step of this requires close mathematical knowledge!It won’t work if you miss a step or make a wrong step!
Zhu Yunzhen wanted to verify what he said.

He took Lao Zhu and all the ministers and officials directly to an artillery test firing site on the spot.

Live demonstration on how to use knowledge of functions to determine orientation and distance.

Fang Xiaoru gave it a try, selected a target, and asked Zhu Yunxu to tell him the location and distance.

Then measure.

The results turned out to be accurate!

Zhu Yunxuan was able to determine the direction and distance just by visual inspection. This was almost completely unbelievable in the eyes of everyone!

Fang Xiaoru still didn't believe it.

He said: "Perhaps this is just due to His Highness the Grand Sun's extraordinary talent?"

"If it had been anyone else, it wouldn't have had the same effect!"

But unfortunately, Zhu Yunzhen called Lan Yu over on the spot, long before the invincible general's cannon was created.

Zhu Yunzhen had already begun to instill artillery thinking in Lan Yu.

Naturally, he also taught him something.

It's just never been compiled into a book.

Lan Yu also learned pretty well and has already used the basic algorithm.

Zhu Yunxi asked Lan Yu to measure the direction and distance out of thin air just like he had just done. Under Fang Xiaoru's dead expression, Lan Yu actually measured accurately!

Although the error is larger than that of Zhu Yunxian.

But it also shows that this method can be replicated!
Later, Zhu Yunzhen personally adjusted the design and scheduling of the artillery, and asked Fang Xiaoru to personally place the artillery targets.

Fang Xiaoru racked his brains and tried his best to find a way.

He wanted to deliberately embarrass Zhu Yunzhen.

But with a 'boom'!There was smoke and shells fell to the ground!The target object exploded!

The flames rise!

Fang Xiaoru's face suddenly fell down, as if she was mourning for her heir!

"it is good!"

Lao Zhu looked ecstatic and couldn't help clapping his hands.

And many generals behind him couldn't help but rejoice.

Jumped up with excitement!

Artillery is a weapon of war!And if everyone can have Taisun's accuracy in the future, wouldn't it mean that in the future, the Ming Dynasty's artillery shells can hit whoever they want!

A perfect shot?

How terrifying!
Lao Zhu even ordered on the spot: "Arithmetic must be promoted!"

"In the future, we must promote it in the army! Select those who are good at arithmetic and become artillery!"

"We want to build an artillery unit that all knows math!"

Seeing this effect, Lao Zhu was very excited!

Just generalize arithmetic, especially trigonometric functions.

In the future, the Ming Dynasty’s artillery will be able to hit whoever it wants?
Even Beiyuan's cavalry would be unable to handle these artillery pieces!
Watching a group of military generals and Lao Zhu support the promotion of arithmetic.

Fang Xiaoru's face was even uglier than her dead parents. She wanted to stop it, but she didn't know how to do it.

Could it be that today... I just lost like this?

Fang Xiaoru was extremely unwilling!How many times have you been defeated by Zhu Yunzhen?Will he continue to lose this time?

Absolutely not!

At this moment, Fang Xiaoru was like a drowning person, desperately trying to grab the last straw.

"Who can save me?"

Fang Xiaoru couldn't help shouting in her heart: "Who can save me!"

(End of this chapter)