Why is it OK that the circle is 360 degrees, and why is the circle 360 degrees

There are many explanations for this. The most popular speculation is that in 3000 B.C., the ancient Sumerians, who lived in present-day southern Iraq, calculated the sun's orbit around the earth in 360 days, so they divided the circle into 360 equal parts. This coincides with the ancient Babylonians who lived in the same region 2,000 years ago, who used a mathematical system of 60.

They applied this system to divide the angles into 60 degrees, and 6 such angles were combined to become 360 degrees, which was about the same as what the ancient Sumerians thought.

Angles, and the hexadecimal system of clocks and watches are all established for the convenience of equal division.

The reason why the circumference is specified as 360 degrees is now more accepted is that the ancient Egyptians believed that 360 days was a year (although there were some discrepancies with the reality), and the time of the year was exactly observed to observe the ecliptic plane cycle for one week, and the ancients used a simple philosophical unified view that 360 was a constant in the world, so 360 was later used as the degree of circumference when astronomical observation and circumference measurement.

The ancient Babylonians used the base 60 system, and humans still use the base 60 system when recording time and angles. 60 is divisible, it contains as many as 10 factors, and among the numbers within 100, it has the most factors, only 96 can match it. But 96 is much bigger than 60.

In this way, when splitting 60, fewer decimals can appear. This is the reason why the base 60 system is still used today.

It's interesting to say upstairs, but isn't the 720 polygon more like a circle?

The base system is artificially set, as for whether there is a basis for I dare not speculate, however, it is not necessary to choose this is certain. After the selection, it is customary, and everyone is unified for convenience.

The reasons why <> circle is 360 degrees are as follows: 1. First of all, it is easy to divide the circumference of the sixth, because the chord length of the sixths is equal to the radius, so the evenly divided degree of cherry blossom should be divisible by 6. In the same way, right angles are the most used in architecture, and a circumference is 4 right angles, so the degree of equal division should also be divisible by 4.

And 4 and 6 are both factors of 360. 2. It contains the most factors, integers from 2 to 10, except for paragraph 7, which are all factors of 360. That is, 360 is divisible by 2, 3, 4, 5, 6, 8, 9, 10.

If you must include 7, the most slippery number is 2520, this number is too large, and the situation of seventh division is rare, so the final determination is that in addition, the concept of time is determined by the rotation and revolution period of the earth and the moon, and the rotation of the celestial body is 360 degrees, for the convenience of the time unit, we should also try to choose 360 as many as possible to choose the whole number with many factors. It is no coincidence that 12 months of the year, 30 days of the month, 24 hours of the day, 60 minutes of the hour, these numbers are all factors of 360.

The reason why the circumference is prescribed as 360 degrees is that the ancient Egyptians believed that 360 days was a year (although there were some discrepancies with the reality), and the time of the year was just to observe the ecliptic plane.

Cycle for a week, and the ancients used a simple philosophical unity of view, believing that 360 is a constant in the world, so later in astronomical observation and circumference measurement, 360 was used as the degree of circumference.

The most essential, primitive angle is obviously from the circumferential angle.

Started! Then, the circumferential angle is exactly the angle corresponding to the entire circumference! The ancient Egyptians moved from the daily silver of the sun to the rising and setting cycles of the Nile and every other year.

The meaning of "year" is realized at intervals when the water floods regularly. This, coupled with the fact that the Egyptians had developed astronomy, allowed them to track Sirius very well.

so they set the year at 360 days (of course, such an error is large. But that's for later).Based on this, the angle of the ------ circumference of a circumference in the simplest period is defined as 360 degrees.

A circle represents an infinite polygon.

And an angle of a polygon wants to become a circle, when the inner angle of this angle is less than 180°, the inner angle needs to increase, and when the inner angle is greater than 180°, the inner angle needs to decrease, so it can be seen that at each point on the circumference of a circle, the inner angle is 180° and the outer angle is 180°, and a circle is composed of countless points, so the inner angle of the circle is infinite, and the outer angle is infinite. The formula for the sum of the inner angles of a polygon is [n minus 2 times 180], then when a polygon has its sides infinite, the sum of its internal angles is infinite, and the circle can be regarded as a regular polygon of infinite polygons, so the sum of the inner angles of the circle is infinite.

You can draw a maximum regular hexagon in the circle, and draw six line segments to the vertices of the hexagon with the center of the circle, and six regular triangles are formed in the hexagon, because the degree of one vertex of the regular triangle is 60 degrees, so the degree of the circumference of the center of the circle is 60*6=360 degrees.

Fold it symmetrically in half with a piece of paper, and the center of the circle is exactly 4 right angles, so the inner angle of the circle is 360 degrees.

Right.

The reason why the circumference is specified as 360 degrees is that the ancient Egyptians believed that 360 days was a year (although there were some differences with the reality), and the time of the year was exactly observed for a week of the ecliptic plane, and the ancients used a simple philosophical unified view that 360 was a constant in the world, so 360 was later used as the degree of circumference in astronomical observation and circumference measurement.

Rotundity. Prescribed for 360 °, it is ancient Babylon.

People are looking at the horizon.

When the sun rises, the Great Tan Tremor moves about one position every 4 minutes, 360 positions in 24 hours a day, so the inner angle of a circle is 360°. This ° represents the sun.

A circle is a type of geometric shape. By definition, a compass is usually used.

to draw a circle. The diameter of the inner circle of the same circle and the length of the radius are always the same, and the circle has an infinite number of radii and an infinite number of diameters. A circle is an axisymmetric, center-band-finger-symmetrical figure.

The axis of symmetry is the straight line where the diameter is located.

Because of mathematical reasons, the composite number can be divided by any number of 1 10, and all positive integer states within 360 have the most factors in the air, and because of the blind length of a year, people know through the observation of natural phenomena that there are 365 or 366 days in a year, which prompts the universe to be defined as 360 degrees, and the algorithm of the ancient Bilong uses a decimal 60 number system to evolve, and a circumference is defined as 360 degrees by the posture disturbance.

This is calculated according to the principles of mathematics, 360 degrees is a circle, there is a problem of angles, there are some mathematical theories.

Because it is artificially prescribed, because the circumference is a circle, and the end point is connected to the beginning, it is specified to be more than 360.

Since ancient times, the sages of the first collapse calculated that the circumference of the circle is c = d, which is approximately equal to. By using the infinite accurate calculation of the circle inscribed regular polygon, it is found that the circumference of the circle inscribed regular polygon is s=2nr*sin( n),n 3, so when n=, s=c, then d=2nr*sin( n), take the value approximately equal to calculate =, this c value represents the arc length of this table, according to the conversion formula of the roundness and angle of the arc = r, the circumference of the circle =2 r r=2 =2*180=360 degrees.

The ball is made up of an infinite number of circles, so it is said that the circumference of all circles is 360 degrees.

All the circumferential angles of the sphere are 360 degrees.

The degree of the ball is only matched by the wild, and the spine is spherical.

denotes that it is equal to the sphere area radius

Spherical area = 4 r and sphericity = 4 r r = 4 can also be referred to as solid angles.

It is equal to the area of a ball with a vertex as the center of the circle and a radius per unit length, and the part truncated by the solid corner.