Ning Caiyun's proof method is relatively troublesome. Of course, this trouble mainly refers to the way of proof, not the method - she uses the fold method, which is to take a line in the middle of this triangle, and then prove that the left side equals the right side through calculus, this method is fine, this is the way......

"Suppose the three vertices of this triangle are marked by heaven and earth. Among them, the celestial position is equal to the celestial position. Then add a line down at the day point, this line intersects with the earth-man line, and takes a point as yellow. ”

"Then, the heaven and earth Xuan triangle is divided into two triangles, Heaven and Earth Yellow and Tian Xuan Yellow."

"Then calculate the area of the two triangles, that is, the area of the rehmannia is half of the product of the rehmannia and the rehmannia ......"

What Lu Yun looked at was called a bewilderment.

He finally knew how hard the geometry of the world really was.

Far from it, the process of argumentation alone, and the positioning of each point, is much more complicated than that of the earth.

It can't be helped, because there is no English in this world......

Geometry on Earth is not difficult to learn, and positioning in English is a large part of the factor.

For example, the triangle ABC, which side is AB, which side is BC, etc., and various symbols, such as "△", "∠", "∵", "∴", etc.

It looks simple and straightforward.

It's completely different here, and basically everything needs to be represented in Chinese characters.

As soon as this Chinese character is written, it looks like a short story, and I can't tell where it will be bypassed......

It is also the Heaven and Earth Xuanhuang and the universe, if some Leng Ding, who has a bad brain, sees it and thinks that this is a secret book of exercises, it is not impossible.

Therefore, what can be solved with almost a few dozen characters, Ning Caiyun wrote hundreds of words in this text, and Lu Yun saw it with two big heads!

"Finally got it." After Lu Yun read it from beginning to end, he let out a long breath: "I didn't say it, your theses are indeed too complicated...... Not only is the process complicated, but the text is also very complex. ”

I have to say that Ning Caiyun is a girl with her own opinions.

She didn't mean to look down on Lu Yun, a person who had never studied formation diagram at all, but agreed very much with Lu Yun's words: "I also think that this solution is too complicated, but I can't think of any particularly good solution for a while." Senior Brother Lu, if it were you, how would you solve it? ”

"Change me, it's simple," Lu Yun looked left and right, and Ning Caiyun took a brush very cooperatively: "Is this it?" ”

Lu Yun looked at the brush: "......"

"It's okay," it's definitely not as good as the pen given to him by the Heavenly Dao Laboratory, but it can only be dealt with, and Lu Yun began to draw.

He first drew a triangle and then marked the three corners: "This is the isosceles triangle ABC." ”

“ABC？” Ning Caiyun frowned slightly: "What does this symbol mean?" ”

"The symbol represents the triangle because these three symbols are easy to write and remember." Lu Yun explained casually: "And the most important thing is that it can be distinguished from Chinese characters, so it is not easy to make it too confusing." ”

Ning Caiyun looked at the triangle on the table, thought for a while, and suddenly his eyes lit up: "Senior Brother Lu, you mean that the symbol representing this triangle can be more recognizable when it is distinguished from the text, right?" ”

"That's right," Lu Yun smiled, "That's the reason." ”

Ning Caiyun nodded, and then watched quietly.

Lu Yun continued: "Then let's start arguing. In the process of argumentation, we need to have a variety of symbols to replace words, so that the process can be infinitely simplified and not chaotic. ”

Ning Caiyun was stunned for a moment: "Is this okay?" ”

"Then it must be," Lu Yun began to write: "∵AB=AC, AC=AB, BC=CB, ∴△ABC is equal to △ACB, ∴∠B=∠C." ”

Ning Caiyun: "!! ”

That's it?!

Although I can't understand it, it feels so high-end!

Ning Caiyun's beautiful eyes suddenly lit up, to be honest, she couldn't understand the symbols in it, but her intuition told her that there must be no problem with this solution!

"Senior Brother Lu," Ning Caiyun pointed to "∵" and asked, "Is this symbol because of the meaning?" ”

Lu Yun nodded and said with a smile: "That's right." ”

Ning Caiyun asked again: "Then this ∴ is what it means?" ”

Lu Yun: "Smart. ”

"Indeed, it looks a lot easier with symbols." The more Ning Caiyun looked, the more surprised he became.

In fact, there is no problem with her solution, although it is more complicated than Lu Yun's solution, but it cannot be said to be wrong.

But in terms of brevity, it's not a grade at all.

Lu Yun's process of solving the problem, the conciseness and clarity of this symbol, is really shocking.

She needs to write hundreds of words to solve the process, and when she arrives at Lu Yun, such a short line of words is enough to explain clearly!

Ning Caiyun was shocked here, but just behind the two of them, he suddenly remembered the sound of applause!

"Bang bang bang!"

The two turned their heads to look, and when they saw a gentleman looking at those symbols with interest, Ning Caiyun hurriedly got up and saluted: "Ning Caiyun, I've seen Mr. Lanya." ”

The gentleman who taught the formation diagram is surnamed Lan, and his name is Lan Yazi, who is middle-aged in appearance, but he is extremely stable, and the most important thing is that he can accommodate new things, not the kind of old pedant who doesn't want to change at all.

He looked at the symbol on the paper and asked Lu Yundao, "Your name is Lu Yun?" Where did you learn these symbols? ”

"Disciple Lu Yun, I've seen Mr. Lanya," Lu Yun saluted first, and then said, "These are all disciples who have learned by chance, but they have not learned it." ”

"Oh?" Mr. Lanya smiled and said, "It's really strange to be able to realize this. I think your argument process is concise and very useful. If you don't mind, can you tell me about it? If this thing can be promoted well, it will be of great use to arithmetic! ”

Mr. Lanya has been teaching for many years, and he also has a headache about the previous problem-solving methods.

Not to mention complexity, the efficiency is too low.

Any question has to be written for a long time.

In fact, this has to be thanks to the fact that this cultivation realm has already streamlined the numbers, otherwise it would be a ......

Just writing these ten numbers is maddening.

However, despite this, it is still extremely difficult to popularize.

Just imagine, just one or two hundred words for any question, which is still a simple triangle verification question.

If you change it to the root number square pi......

Hehe.

So Mr. Lan Ya immediately felt that Lu Yun's method was definitely useful, as the so-called connoisseur knew what was going on with this thing at a glance, Mr. Lan Ya was not a fool, so he naturally understood.

Lu Yun touched his chin and thought for a while, it didn't seem to hurt to popularize this thing, and he immediately nodded with a smile: "If Mr. doesn't dislike it, then the disciple is naturally willing to tell Mr. about it." ”

"Haha! So much better! Mr. Lanya laughed and patted Lu Yun on the shoulder: "I will definitely report this matter, Lu Yun, you don't have to worry, I still disdain to take the credit." ”

He was An Luyun's heart, and Lu Yun hurriedly expressed his gratitude: "The disciple has thanked Mr. Lanya." ”

"You're welcome, come on, don't hesitate, let's start here!"