﻿ Two Common Questions about Soccer Balls - Shangrao ActEarlier Co.,Ltd
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# Two Common Questions about Soccer Balls

## 1. Why the soccer ball design is pentagon or hexagon?

Many people wonder that why soccer balls must be composed of the joint of pentagons and hexagons? Can it be composed of other shapes?

Let's learn about the effectiveness of the joint of pentagons and hexagons:

The backward inside is composed of 2 regular hexagons and 1 regular pentagon. The summation of angles is 348 (120°+120°+108°=348°). It's closed to 360°, but it doesn't reach 360°. It's not going to be pieced as a plane, which aims to piece it to be a ball.

Of course, some people ask why not use regular triangles or other regular polygons to piece? If this question is mathematized, theoretically, the answer is infinite. No matter what polygons it uses, it's feasible if the above requirements for the angles' summation that "closed to the round angle but smaller than it".

## 2. The color of soccer ball design

Generally, the soccer balls we see are black and white. Of course, some soccer balls in current sporting goods shops are colorful. However, soccer balls are still black and white in many people's concepts, and blacks are regular pentagons, while whites are regular hexagons. Why are soccer balls black and white? Let's talk about that.

Actually, it doesn't have too much meaning that soccer balls are black and white. Its function is to make spectators watch clearly in front of the TV. The World Cup in Mexico in 1970 is the initial global TV live through satellites. In order to make spectators clearly watch the soccer ball in front of the black and white television, the designer insert black pentagons on the original white soccer ball, and this revolutionary design also wrote a new page in the history of soccer. Of course, with the improvement of transmission technology, televisions change from black and white to colorful and HD, so the color of soccer balls don't need to be black and white.