The Pythagorean theorem is known to any person who has received nine years of compulsory education, but few people know about it in ancient times when Confucian classics were used as teaching materials.

In Qingzhou College, founded by Wu Zhi, the Pythagorean theorem is only the basic basis of mathematics, and even if Wu Zhi only vaguely writes some basic formulas used in the geometry of the Pythagorean theorem in later textbooks in the textbook, it is enough to be more practical than "Nine Chapters of Arithmetic".

Fang Cai Xiao Wang measured the angle of sunlight, which is equivalent to knowing the three inner angles of the right triangle composed of the ancient tower and the shadow of the ancient tower, plus the data of measuring the shadow of the ancient tower (the bottom edge of the triangle), and finally using sin, cos or something to calculate, it is easy to get the actual height of the ancient tower.

That's the power of knowledge!

Many people in later generations said that learning mathematics is the least applied in life, and it is not necessary to buy groceries...... In fact, the practical application of mathematics in life is no less than that of language.

"The Pythagorean theorem?"

The three Miyamoto fathers and sons and a group of little Japanese were dumbfounded, they had never heard of this term at all.

"There are these methods in the arithmetic textbook of our Qingzhou College, and I will send a set to you for research and research!"

Wu Zhi got up from the chair lazily and closed the paper fan leisurely.

"Master Wu is broad-minded, I admire him!"

Miyamoto's father and son saluted Wu Zhi, and in ancient times, they paid attention to self-cherishing the broom, and Wu Zhi was able to teach them this "high technology" so readily, which naturally made them grateful to Dade.

Even Qin Hui, Ning Yuan and others around him were secretly proud of Wu Zhi.

"Okay, what is this second problem, I hope Mr. Miyamoto will show it as soon as possible."

Wu Zhi asked, confident and confident.

The three Miyamoto fathers and sons and the retainers glanced at each other, and then Miyamoto Yewang bowed down and gestured to Wu Zhi: "Lord Wu and all the adults, please come with me!" ”

"Someone, prepare the car!"

Wu Zhi and his entourage followed Miyamoto Yewang out of the ancient temple and got into the carriage.

The carriage jolted for nearly an hour, until the air was filled with the salty smell of the sea.

Miyamoto Nobo took Takeshi and them to the beach.

Nagasaki is located on the coast of Japan, with many islands and mountains, but here the waves are calm and the bays are deep, and it is a natural excellent harbor, and it is the most important port for trade between the Great Song Dynasty and Japan.

"Mr. Miyamoto, you brought us to the beach, but you want us to measure how many buckets of water there are in this sea?"

After getting out of the car, Wu Zhi said humorously.

"The adults laughed, the so-called sea water is not to be measured, just as adults cannot be disguised!"

Miyamoto wanted to pat Takeshiki on the back, but who knew that Takeshi would be upset as soon as he heard this.

"You mean, I'm not good-looking?"

"No, no, my lord misunderstood!" Miyamoto Yewang shook his head again and again: "My lord is a gentle son, and the appearance of the Venerable Master can be described as a dragon and phoenix among people!" ”

"That's it!"

Although Miyamoto Yewang speaks Chinese bluntly, he knows a lot of idioms, and Wu Zhi, who is a sycophant, is very useful.

"What problems are you trying to come up with here?"

"My lord, this second question is still a measurement question, please come with me."

A hint of smugness slid across Miyamoto's face, and he led Takeshi and them around to the middle of two cliffs by the sea.

Although it is sandwiched by two cliffs, the scenery is very different, the quiet and deep blue water passes through the cliffs like a jade belt, and Wu Zhi and the others stand on the shore as if they are standing in front of a huge mirror.

"Miyamoto-sama wants us to measure the depth of this water? Isn't this humanly possible? ”

Qin Hui threw up his sleeves at Little Japan dissatisfied.

"Hehe, Lord Qin misunderstood, we don't want you to measure the depth of the sea, but to measure the geometry between these two cliffs?"

"Oh? Measure the distance between these two cliffs? ”

The corners of Wu Zhi's mouth rose slightly.

"Not bad! The bay between these two cliffs is home to Nagasaki's most famous shark nest, and no fisherman in Nagasaki has ever been able to sail from one end of the cliff to the other side, whether a large or small boat is exposed to sharks once they launch here! We hope that Lord Wu can break this precedent and measure the distance of this strait by driving a fishing boat! Of course, it would be best if you could measure the distance of the strait without taking a boat. ”

After Miyamoto finished speaking, Wu Zhi, Song Jiang, Qin Hui and others couldn't help but take a closer look at the depths of the sea, and this look made them stand on end, only to see that in the depths of the blue water, there were indeed countless black shadows swimming.

"Since no fishing boat can reach the cliffs on the other side, how can we measure the distance between them!" Lord Ning Yuanning will also be a little uneasy, little Japan is obviously bullying!

Qin Hui was much calmer, after he carefully looked at the blind spot between the two cliffs, which happened to be in the blind spot of the sun's backlight, and there was no way to measure it with the Pythagorean theorem...... He's just starting to get started.

"Humph! This is not something that can be done by human beings at all, Miyamoto-sama, you have violated the law, so let's change the subject! ”

"Hehe, how can Lord Qin Hui use strong words? These two cliffs can come and go freely with just rowing, and sharks don't necessarily capsize the boat, so how can it be said that it is impossible to do it by man? Miyamoto retorted.

"Yes, I have heard for a long time that the Great Song Dynasty was in the kingdom, not only was culture and education prosperous, but also full of talent and learning, like a carp crossing the river! The martial arts are even more extraordinary, and there are countless heroes in the world, so I don't even dare to cross this small strait! Miyamoto said.

The words of the two made Qin Huining speechless, and the retainers behind him were also secretly proud, saying that this group of Song envoys did not understand the skills of the imperial ship at all, and once they went to sea, they would definitely be buried in the belly of the shark, and they definitely did not dare to go to sea.

But if there is no sun here, if you don't go to the sea, you have to see how they measure the distance between the two cliffs!

This time, they should retreat and go back to the Great Song Dynasty in a gloomy way!

"It's tricky!"

Wu Zhi chuckled and shook his head, he could see that this time it was "courage" that little Japan was going to test them!

If there is no courage to sacrifice one's life for righteousness, who would dare to row across this shark strait!

"Master Wu, I can give you a day, and after a day, if you don't measure the distance of the strait, you must keep your promise, either develop gold mines according to our Japanese conditions, or give up the idea of hitting gold mines!" Miyamoto has already put on the posture of a victor.

"Miyamoto-sama, it's too early to talk about this!"

Wu Zhi pretended to unfold the folding fan and said loudly: "Why does it take a day to measure the distance between these two straits? Just give me half a pillar of incense and that's enough! ”

As soon as these words came out, not only Xiao Japan was stunned, but Qin Hui and Ning Yuan around them were also anxious.

"My lord! Half a pillar of incense is not enough time to even get off the boat! ”

"Yes! Adults, please don't play with children's play! ”

However, Song Jiang and An Daoquan were determined, they had followed Wu Zhi for many years, and they had long been accustomed to Wu Zhi's shocking customs, and they absolutely believed in Wu Zhi.

"Don't be impatient, two adults, since you say so, you have your own adult's reason." Song Jiang Road.

When Qin Hui heard this, he calmed down for the first time, and he suddenly realized that the person in front of him was the top big man in the Great Song Dynasty, his Bole, Tai Academy, and Zhaowenguan University scholar Wuzhi!

Is there anything else that Takesik-sama can't handle?

No!

"Is that serious?" Miyamoto Yewang on the side asked coldly, he also felt that Wu Zhi was playing child's play, but he planned to seize the opportunity of Wu Zhi's child's play to thwart the Great Song envoy in one fell swoop.

"Seriously, seriously!"

"Good! Come on, light incense! ”

Someone immediately lit incense, and the half-pillar incense would soon pass, and the Japanese were full of ridicule, they never believed that Wu Zhi could measure the distance of the strait in the time of half-pillar incense.

"My lord, the measured distance can't be the slightest bit wrong with the answer we have!"

Miyamoto was afraid that Takeshiki would only use visual inspection to get by, but his words also revealed that they really knew the correct answer.

"Don't worry! It's so clean here, our answer is definitely right! ”

Wu Zhi smiled proudly, and then beckoned to the entourage Qingzhou Academy students behind him.

"Xiao Li, you can take a test!"

"Yes."

A young man who was cultivating in the Qing Dynasty came out in response.

After the salute, the boy tiptoed to the edge of the cliff, and then he made everyone stunned and shouted at the cliff on the other side.

"Ahh

(Happy Mid-Autumn Festival, hey~)