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Text Chapter 31 Geometry

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    The so-called overshadowing the guest and taking over the host is probably nothing more than trying to occupy the magpie's nest.  It was originally the carriage of the old man Professor Chen, but now it belongs to Yunyang and Hong Dou.  Yunyang felt sorry for letting an old man follow him on foot underground, so he got out of the carriage again. Hong Dou also got down, pulled out the big knife from the carriage, and put it on his back.  "Professor Chen, you'd better sit in this carriage. I can just follow you on foot." "Oh this" The old man glanced at the expressionless Hong Dou, hesitated for a moment, and finally sat on it, but he still didn't  Wang stuck his head out and shouted to Yunyang: "Follow the carriage, I will take you to the Star Gazing Pavilion." Yunyang nodded helplessly.  ¡°Probably because all the students are going to class at the moment, there are not many people moving around in the college at the moment.  Qiankun Martial Arts Academy is divided into the main courtyard and the back mountain. The main courtyard is divided into three parts: the liberal arts academy, the martial arts academy, and the inner courtyard. When passing by the martial arts academy, Yunyang saw one after another heroic young people there.  Following the guidance of the martial arts professor, I performed one set of punches after another very seriously.  Some students were sitting quietly on the ground, apparently practicing silent breathing exercises and absorbing the spiritual power of the sun.  Yunyang knew that after infusing the whole body with the power of the sun through special meditation techniques, he would also use matching boxing techniques to exercise different parts of the body, ultimately achieving the goal of making the body strong.  These boxing and martial arts skills can also be used in actual combat.  It¡¯s a pity that Yunyang can¡¯t practice, so he has no way to participate.  Otherwise, with the resources Yunyang has at his disposal at the moment, even a pig should have the fifth or sixth level of physical cultivation.  Qiankun Martial Arts Academy occupies a huge area. Yunyang followed the carriage forward, bypassing various pavilions and pavilions, and then walked along the mountain road paved with bluestone slabs for a while before arriving at the top of the hill.  The so-called Star Gazing Pavilion is here.  Chen Hai got off the carriage and walked towards the Star Viewing Pavilion with Yun Yang and Hong Dou who had been following Yun Yang.  Before he could reach the door, Yunyang heard bursts of heated debate coming from the Guanxing Pavilion. After listening for a while, he heard that the debate inside was about the geocentric theory and the heliocentric theory.  When the door was pushed open, Yunyang saw at least seven or eight old men with white beards and white eyebrows inside, holding various charts in their hands and having a heated debate.  Upstairs, Yunyang also saw instruments similar to ancient armillary spheres, guidian watches, and clepsydras.  An old man did not participate in the debate, but was carefully reading a book that seemed to emit a cyan light.  There is a huge bookshelf behind the old man, which is full of books. There are books everywhere on the old man's table, under the chair, and on the floor.  "Everyone, I have brought Yunyang. If you have any questions about the heliocentric theory, you can ask Yunyang." Chen Hai stood in front of the door and said loudly.  So a group of old men immediately stopped their discussion and looked at Yunyang. The look was like a hyena seeing carrion, which made Yunyang couldn't help but feel chills all over.  Hong Dou behind him seemed to sense it and moved his shoulders slightly.  "Are you Yunyang? The fifth gentleman in the academy? The devil incarnate? The number one playboy?" "It doesn't matter who Yunyang is, as long as you can answer the questions in our hearts Yunyang, you said that Chang Geng also has phase changes like the moon.  "Is this true?" "The distance between Chang Geng and the Zuxing is really changing all the time?" "If the sun is the center of the universe, why does the phenomenon of Yinghuo regression occur at different orbital speeds" A group of old men surrounded Yunyang aggressively.  , asking all kinds of questions, which made Yunyang feel a little dizzy.  Yunyang looked at Chen Hai: "I'm not here to debate the heliocentric theory and the geocentric theory with you but to teach you how to determine the size of the ancestral star" "Oh? You really have the ability to determine the size of the ancestral star.  The solution? Tell me quickly. " "If this method is finally proven to be feasible, even if you have made a great contribution to our Shenghua City" The buzzing discussion was still going on. Behind me, the old man who had been reading was hearing.  After Yunyang said the words "determine the size of the ancestral star", he finally took action.  He slowly closed the book that seemed to be glowing with green light in front of him, and then stood up.  I don't know if it was Yunyang's illusion or something else, but Yunyang suddenly found that the old man's figure seemed a bit ethereal and unreal, just like Zhang Yue who had just been promoted to the extraordinary realm.  Yunyang felt a chill in his heart.  "Everyone, be quiet and go back to your seats." The old man gave a faint order, and the other old men immediately shut their mouths and returned to their seats.  Even Chen Hai walked over obediently.  The old man walked over slowly and stood in front of Yunyang, "I am Feng Wei, the dean of the Qiankun Martial Arts Academy." Yunyang's heart moved again.  Qiankun Martial Arts Academy was founded by Master Wu Qingyun, the dean of the martial arts academy is Zhao Ke, and the dean of the liberal arts academy is actually Mian.?This old man.  This is a big shot who is equal to Zhao Ke.  His status as the dean of the Academy of Arts means that his attainments in the art of literature can be compared to Zhao Ke's attainments in the art of martial arts.  Yunyang bowed down respectfully and saluted, "Yunyang pays homage to the senior dean." Behind him, Hong Dou also lowered his head slightly, but his expression remained unchanged.  Feng Wei said calmly: "You said you have a way to determine the size of the ancestral star. You might as well tell it." Yunyang hesitated for a moment.  Determining the radius of the earth requires certain geometric knowledge such as triangles, circles, parallel lines, etc. Yunyang did not know whether the old men in front of him had mastered these things.  Feng Wei obviously misunderstood what Yunyang meant, so he said calmly: "You don't have to worry about the required resources. If your method is feasible, the entire Shenghua City, including many Transcendent Realm masters and the military, can provide it."  You drive me." "What? Just measuring the radius of the earth allows me to use the power of the entire Shenghua City?" Yunyang was surprised.  Yunyang realized how important this matter was to them from Feng Wei's words, and his face couldn't help but become serious.  Yunyang cupped his hands: "Before I tell you this method, I need to confirm whether everyone has mastered the relevant knowledge." Yunyang said, walked to the table in front, grabbed a pen and paper, and wrote  A right triangle is drawn above.  "What is your understanding of this triangle?" Yunyang asked.  A group of old men looked at the figure intently. Feng Wei frowned and said, "It's just a triangle." Yunyang drew another straight line and a circle and said, "Do you know the angle?" "Angle?" Feng Wei asked.  "Yes, angle." Yunyang nodded and said to Feng Wei: "I wonder if the dean can divide this line into one hundred and eighty equal parts For example, this is an angle, and this is another angle. I  We need one hundred and eighty angles with the same angle." "What's the problem?" Feng Wei waved his hand and didn't see Feng Wei draw a pen. The straight line extended to one hundred and seventeen points.  Nineteen straight lines are exactly divided into one hundred and eighty equal parts.  Yunyang was shocked: "This Feng Wei is indeed a master of the extraordinary realm." "As you can see, I call the angle between these two line segments one degree. Taking the straight line as the starting point, count two lines.  Two degrees, three lines are three degrees Can you understand it?" "Of course it can be understood." Feng Weidao, "How does this relate to determining the size of the ancestral star?" "A certain amount of knowledge is required before determining the size of the ancestral star.  "Basics." Yunyang said, "Everyone didn't know about this before, so Yunyang needs to teach everyone about this first." Feng Weidao: "Of course I knew these things before, but you.  This kind of angle is quite new at the moment. " "Yes." Yun Yang nodded, "As you can see, an angle of 180 degrees is actually a straight line Then, by extension, a circle is actually a straight line.  Three hundred and sixty degree angle. Dean Feng, you can use the center of the circle as the base point, divide the circle evenly into 360 parts, and then compare it with the 180 parts, you can find that each part is  "It's the same." Feng Wei nodded: "That's true." "You can also find that after dividing a circle into 360 parts, the arc length of the circle corresponding to each degree of angle is the same.  We can draw the conclusionas long as the angles are the same, in the same circle, their corresponding arc lengths must be the same, right?" Yun Yang also gradually became serious.  "That's true." The old men thought for a moment and nodded.  "Okay, that's enough about circles and angles. Here is some knowledge about parallel lines" Yunyang said and drew two parallel lines. "The definition of parallel lines is that a straight line can be perpendicular to these two lines at the same time.  lines, then these two lines are parallel lines. Well, vertical means a ninety-degree angle. If you don¡¯t believe me, you can measure it Also, you can find that after the line segments intersect, the angles of each two vertex angles are the same.  , then the sum of two adjacent angles must be one hundred and eighty degrees" Yunyang turned Guanxing Pavilion into a primary school classroom, and the students were these old men.  Perhaps because the concept proposed by Yunyang was so novel, all the old men listened attentively, including Feng Wei.  After a complete popularization of geometry knowledge such as triangles, circles, angles, etc. in Yunyang, the old men were still thinking carefully. Feng Wei frowned and said: "You have said so much, what should be the size of the ancestral star?"  Determination? "  Yunyang smiled faintly: "Don't be anxious, it will be soon Before I start measuring the size of the ancestral star, I have a question. The summer solstice, oh, is the longest day and the shortest night in a year.  When is that day?¡± ¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª Please recommend~and collect~ Friends who haven¡¯t registered a Qidian account yet, please register an account and collect this book~, the second update will be  After~
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