Taylor's clever test pyramid height

The ancient Egyptian pyramid is one of the seven miracles of the world. Does anyone have measured the height of the pyramid in ancient times?

This has to be mentioned that he is Taylorus, an ancient Greek philosopher. He is also an ancient Greek natural scientist and philosopher. But Taylorus's most popular highlight is to measure the height of the Egyptian pyramid. So how did Taylorus do?

It is said that the sun was high that day, Taylorus came to the pyramid, and the sun cast his shadow on the ground. Every time, he allowed people to measure the length of his shadow. When the measurement value coincides with his height, he immediately marked the big pyramid on the projection of the ground, and then measured the distance from the bottom of the pyramid tower to the projection spire. After that, he reported the accurate height of the pyramid.

Facing the puzzled and questioning people, Taylor explained to you how to derive the principle of "tower shadow equal to tower high" from "shadow length equal to the length", which is what the similar triangle theorem is called today: the corresponding triangle corresponds to the corresponding triangle correspondence The ratio of high, corresponding midline, and corresponding angle level lines is equal to similar.

In addition to the similar triangle theorem, Taylor also discovered a lot of theorem of plane geometry: such as a diameter of a diameter; two -tier -to -equity angle; two straight line intersect; Then this triangle is completely determined; the round angle of the semicircular face is right angles; the inner triangle on the diameter of the circle must be a right -angle triangle.

In fact, in addition to mathematics, Taylorus has built achievements in many fields. For example, in astronomy, Taylor measured and calculated the diameter of the sun. He announced that the diameter of the sun was about 1/720 of the Japanese road. The diameter of the sun now is very close. After calculating, he learned that sailing according to the Bear Star is much more accurate than the Big Bear Constellation, and through the observation and research of the sun, the moon and the stars, he determined that it was 365 days a year.

In fact, from the story of Taylor's clever testing pyramid, we can also see that mathematics is closely related to life. In life, as long as we observe and think carefully, we can use mathematics.

This article is scientifically controlled by Li Yifan, a second -level teacher in Wenfeng Middle School in Laizhou City, Shandong Province.

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