And this is something that was not thought of before.

After all, in the original plan, everyone should have given a positive response at this point.

However, the reality does not seem to be the same.

Even with Mr. Li's assistance, it still didn't make everyone interested in the end.

So, Mr. Tan had no choice but to sigh and say, "Fortunately, you are lucky, and I just have a killer feature in my hand." ”

Then, Mr. Tan took out a transparent circle with a radius of about 30 centimeters, and there were several square spaces in the middle, and there was some pink liquid in it.

If you look closely, these things in the middle of the circle seem to be Euclid's Pythagorean theorem model.

In the center is a right-angled triangular stand, while in the three squares on the sides appear to be connected containers, which appear to contain a normal half-pink liquid, and the outer frame is fixed to the circle.

Then, Teacher Tan put the big square in the teaching device downward, and after all the liquid flowed into the big square, Teacher Tan smiled and said, "Okay, now we can see that this big square is filled with liquid." There is so much liquid in the entire closed container. ”

After showing this thing to everyone, Mr. Tan immediately began to spin around with the circle.

As the circle turned, the liquid slowly flowed towards the two small squares.

Over time, the two small transparent squares are gradually filled with a pink liquid.

Then, after the circle had rotated 180 degrees, the liquid filled exactly two small squares, and none of them were outside.

Then, Teacher Tan smiled and said, "Okay, let's see clearly, the area of the two small squares is not the same as the area of the big square." ”

Naturally, seeing such an intuitive expression, children with a foundation in the first year of junior high school can understand it.

And so, a very neat answer rang out - "I see." ”

Seeing such a performance, Teacher Tan nodded all over the ground.

In this way, the sum of the squares of the two right-angled sides equal to the square of the hypotenuse is imprinted in the children's minds.

Teacher Tan looked at everyone with satisfaction.

The whole class seemed to be harmonious.

However, this harmony did not last long, and after a while, Zhou Wen asked, "Then, how did the ancients measure the distance from the sun to the earth through this?"

Teacher Tan naturally frowned when he heard this, after all, to solve this problem, you have to use the sine theorem, the cosine theorem or similar triangles.

And that's all for next semester.

The most important thing this semester is to lay a good foundation for trigonometric functions, not to explore them too ambitiously.

So, Teacher Tan smiled and said, "This, if you are interested, then you can explore it and ask me after class." ”

After a pause, Mr. Tan continued: "Okay, let's go back to the application of the Pythagorean theorem. ”

So, after class, Zhou Wen went up again to ask this question.

There were a bunch of classmates, including Wu Zhenren, around.

Teacher Tan said with a smile: "This distance from the sun to the earth can only be roughly measured, after all, the earth is a sphere, and the sun is also a sphere. This method provided by the ancients is actually not very rigorous. ”

After a pause, Mr. Tan continued: "After all, this semester's book is to lay the foundation for the introduction of trigonometric functions, so it is difficult to solve this problem. However, when you study the textbook for the next semester, you will be able to see it at a glance. ”

So, on the way home, Wu Zhendu seemed a little disappointed.

Li Zengfan said with a smile: "It's not a big deal, I have been exposed to this topic in the Olympiad class, and I will get the result with a set of cosine theorems or sine theorems." However, it is true that there will be a large deviation from the actual distance. ”

Wu Zhenzhen said: "Well, these two theorems are the content of the next semester, right?"

Li Zengfan said: "Well, that's right. ”

Wu Zhenzhen said: "So, is this considered that the Chinese teacher has overassisted the math teacher?"

Li Zengfan smiled and said, "Haha, you can understand it this way." ”

When I got home at noon, I finished eating, turned on the computer, and prepared to enter "Dynasty Warriors 3", but hesitated and retreated.

It seems that the brushing of chess in "Dragon Babu" is more powerful, plus the recent lucky and happy 3, it can be a little stronger at noon an hour every day, and over time, the level will naturally go up.

And the stand-alone game, it seems that how to play it is just a save.

Life seems to be peaceful, and there is still some work to be done in mathematics and geography and biology.

Other subjects are more subtle.

The buoyancy of physics class also seems very boring.

Although Archimedes' backstory is very fascinating, it is no longer so wonderful when it comes to the subject.

However, after all, physics and mathematics are more or less interconnected, so Wu Zhen, who is a mess in theory, will not be ambiguous in his calculations.

It seems that with the increase in level, "Dragon Babu" seems interesting again.

On weekends, Wu Zhenzhen also has to play chess there at noon.

Naturally, this is not a big deal in the first place, and as long as everything goes well, it can be completed quickly, and it will not affect the meal at all.

Although, the time to play chess and the time to eat are highly overlapped.

However, this weekend happened to be a time for the whole family to get together for lunch.

However, everyone came late on this day.

At half-past eleven, there was no one.

Therefore, after Lao Wu went to cook and gave the computer to Wu Zhen, he couldn't wait to start playing chess.

However, at 11:50, the second uncle and the younger uncle's family arrived.

So, Wu Yongyong sat aside and watched Wu really play chess.

Naturally, at this time, Wu Zhen is still confident.

However, it was suddenly discovered that the main output mage in the team actually went to play chess pieces with his bare hands.

So Wu Zhen asked in the chat window: "Brother, what are you doing?

Then, the man made a look of helplessness.

Wu Zhenzhen continued to ask: "What's wrong? Can't you see it if it's stuck?"

The man said, "Look at my weapon." ”

So, Wu Zhenzhen opened the information and looked, good guy, the durability of the weapon has been grinded.

Naturally, if the main mage does not output, then the efficiency of playing chess will drop a lot.

Then, Lao Wu announced: "Dinner at twelve o'clock." ”

At this time, only 107 of the 200 pieces were brushed.

As a result, Wu Zhen looked a little helpless, after all, the main mage has no output, and it will only brush more and more slowly.

However, this seems to be self-inflicted again.

This became a very embarrassing time.

After all, the squad isn't full for more experience, and if you quit the game now, the remaining four teammates will most likely not be able to brush the dungeon.

Plus the brother whose durability of this weapon is gone.,Then it's even more difficult to brush the level.。。

Because the artifact has not yet come out at this time, unless a local tyrant who has played a bunch of high-grade gems, others still need to work together to play chess.

So, after hesitating for a while, Wu Zhenzhen decided not to pit his teammates.