Kaijie Sports
The structure of football, football knowledge that fans really understand!
Release time:
Nov 08,2024
A football is composed of 32 pieces of leather, including 20 white hexagons and 12 black pentagons.
1. A football is composed of 32 pieces of leather, including 20 white hexagons and 12 black pentagons. The standard circumference of a football is no longer than 70 centimeters and no less than 68 centimeters. All black and white blocks can be approximated as congruent regular pentagons and hexagons. This way, football can be approximated as a polyhedron.
2. Each black block of the football is adjacent to 5 white blocks, each white block is adjacent to 3 black blocks and 3 white blocks (black and white alternating), and each vertex is connected to 3 edges. Each vertex of the "football" happens to be a vertex of a black block. The ball for competition should be circular, and its shell should be made of leather or other approved materials. Materials that may harm athletes should not be used in its structure.
3. The origin of modern football is in England. Legend has it that in the 11th century, there was a war between England and Denmark. After the war, the English discovered the skull of a Danish invader while clearing the ruins of the war. Out of anger, they kicked the skull with their feet, and a group of children came to kick it too. However, they found that kicking the skull hurt their feet, so they used cow bladder air to replace it. This is the birth of modern football.
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