Question: Are three sided footballs used?
About the article "Football", section "Based on FA rules".

Candidate passages:
Balls are used for ball games, including footballs. 
Law 2 of the game specifies that the ball is an air-filled sphere with a circumference of , a weight of , inflated to a pressure of 0.6 to 1.1 atmospheres () "at sea level", and covered in leather or "other suitable material".
The weight specified for a ball is the dry weight, as older balls often became significantly heavier in the course of a match played in wet weather.
The standard ball is a Size 5, although smaller sizes exist: Size 3 is standard for team handball and Size 4 in futsal and other small-field variants.
Other sizes are used in underage games or as novelty items.
Most modern footballs are stitched from 32 panels of waterproofed leather or plastic: 12 regular pentagons and 20 regular hexagons.
The 32-panel configuration is the spherical polyhedron corresponding to the truncated icosahedron; it is spherical because the faces bulge from the pressure of the air inside.
The first 32-panel ball was marketed by Select in the 1950s in Denmark.
This configuration became common throughout Continental Europe in the 1960s, and was publicised worldwide by the Adidas Telstar, the official ball of the 1970 World Cup.
The familiar 32-panel football design is sometimes referenced to describe the truncated icosahedron Archimedean solid, carbon buckyballs or the root structure of geodesic domes.
There are a number of different types of football balls depending on the match and turf including: training footballs, match footballs, professional match footballs, beach footballs, street footballs, indoor footballs, turf balls, futsal footballs and mini/skills footballs. 
Law 2 of the game specifies that the ball is an air-filled sphere with a circumference of , a weight of , inflated to a pressure of 0.6 to 1.1 atmospheres () "at sea level", and covered in leather or "other suitable material".
The weight specified for a ball is the dry weight, as older balls often became significantly heavier in the course of a match played in wet weather.
The standard ball is a Size 5, although smaller sizes exist: Size 3 is standard for team handball and Size 4 in futsal and other small-field variants.
Other sizes are used in underage games or as novelty items.
Most modern footballs are stitched from 32 panels of waterproofed leather or plastic: 12 regular pentagons and 20 regular hexagons.
The 32-panel configuration is the spherical polyhedron corresponding to the truncated icosahedron; it is spherical because the faces bulge from the pressure of the air inside.
The first 32-panel ball was marketed by Select in the 1950s in Denmark.
This configuration became common throughout Continental Europe in the 1960s, and was publicised worldwide by the Adidas Telstar, the official ball of the 1970 World Cup.
The familiar 32-panel football design is sometimes referenced to describe the truncated icosahedron Archimedean solid, carbon buckyballs or the root structure of geodesic domes.
There are a number of different types of football balls depending on the match and turf including: training footballs, match footballs, professional match footballs, beach footballs, street footballs, indoor footballs, turf balls, futsal footballs and mini/skills footballs. 
A football, soccer ball, or association football ball is the ball used in the sport of association football.
The name of the ball varies according to whether the sport is called "football", "soccer", or "association football".
The ball's spherical shape, as well as its size, weight, and material composition, are specified by Law 2 of the Laws of the Game maintained by the International Football Association Board.
Additional, more stringent, standards are specified by FIFA and subordinate governing bodies for the balls used in the competitions they sanction.
Early footballs began as animal bladders or stomachs that would easily fall apart if kicked too much.
As time went on, footballs developed into what they look like today.
This was possible with the help of people like Charles Goodyear and Domenico Nobili, who introduced rubber and their discoveries of vulcanisation to the design of footballs.
Today, technological research is ongoing to develop footballs with improved performance. 
Rugby league is played with a prolate spheroid shaped football which is inflated with air.
A referee will stop play immediately if the ball does not meet the requirements of size and shape.
Traditionally made of brown leather, modern footballs are synthetic and manufactured in a variety of colours and patterns.
Senior competitions should use light coloured balls to allow spectators to see the ball more easily.
The football used in rugby league is known as "international size" or "size 5" and is approximately long and in circumference at its widest point.
Smaller-sized balls are used for junior versions of the game, such as "Mini" and "Mod".
A full size ball weighs between .
Rugby league footballs are slightly more pointed than rugby union footballs and larger than American footballs.
The Australasian National Rugby League and European Super League use balls made by Steeden.
Steeden is also sometimes used as a noun to describe the ball itself.