For example, the roofs of some huts; There are countless supports such as high-voltage telephone poles. Trigonometry played a unique role in ancient times. The early trigonometry was not an independent discipline, but attached to astronomy, which was a method to calculate astronomical observation results. Therefore, the earliest development of trigonometry is spherical mathematics, Greek mathematics, Indian mathematics and Arabic mathematics, but most of them are by-products of astronomical observation. For example, Menelaus in ancient Greece wrote "The Science of the Ball" and put forward the basic problems and concepts of trigonometry, especially Menelaus theorem of the ball science.
But in daily life, the use of triangles is not limited to these. In 200 1 year, Russia newly invented a triangular multi-purpose plane, which is a small plane for two people. The plane is called "Kruiz" and is made of ultra-light composite materials. The aircraft fuselage is triangular, and the wing can flexibly change the flight angle under the control of the pilot. "Cruz" is equipped with aerobatic flight, pilot and engine parameter control system, which can complete difficult flight actions with simple operation process. It can not only monitor forest farms, power transmission lines and oil pipelines in the air many times, but also carry tourists to experience thrilling aerobatics. His outstanding performance is inseparable from the characteristics of triangle attack.
So triangles are everywhere in our lives. I think as long as we observe carefully, we can find more secrets in the triangle.
I copied the above, and the following is my original.
Triangle, beautiful appearance. Stability and harmony. The bottom of that camera is a triangle.
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