Pi is calculated by dividing the circumference by the diameter. Pi is the ratio of circumference to diameter. Pi is a very famous number. This figure has aroused the interest of laymen and scholars since it was recorded in writing. Pi, as a very important constant, was originally used to solve the problem of calculating circles.

First of all, Archimedes provided a scientific basis for the calculation of pi. He is the first person to study this constant scientifically. First of all, he proposed a method, which can make the value of π accurate to any accuracy through mathematical processing rather than measurement. Thus, the second stage of pi calculation began.

Extended data:

Precautions:

1, the user needs to stick the double-sided tape on the straight line of the cylinder, then wrap a white paper on the cylinder near the edge of the double-sided tape, stick another white paper on the cylinder, turn the rest upside down and smooth it hard, and finally carefully tear off the excess white paper and throw it away.

2. The user needs to use a ruler to measure the length of the white paper (from the torn side to the opposite side), that is, the circumference of the cylinder. After measurement, it is known that the circumference (c) = 21.4cm. ..

3. Spread the white paper flat on the table, press the cylinder on the paper, fix the cylinder by hand, and draw a circle on the bottom of the cup with a pencil.

Draw a square around the circle with a ruler and a triangle. This step should be carefully slowed down to reduce mistakes.

According to the principle, the side length of a square is equal to the diameter of a circle. According to the measurement, the diameter (R) of the circle is 6.8 cm. ..

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