Football pitch
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A football pitch or soccer field is the playing surface for the game of association football. Its dimensions and markings are defined by Law 1 of the Laws of the Game, "The Field of Play". The pitch i
The goal line at the Stretford End of Old Trafford in Manchester (1992)
A football goal
The penalty area is the large marked rectangular area. The smaller rectangle within it is the goal area (here, the yellow-shirted goalkeeper is the only player in the goal area). The penalty arc is the curved line adjoining the "top" of the penalty area (here, the red-shirted referee is standing near the arc).
Corner arc and flag
Offside is one of the laws in association football, codified in Law 11 of the Laws of the Game. The law states that a player is in an offside position if they are in the opponents' half of the pitch a
Football pitch
…defends is commonly referred to as being their half. Players have to be located within their own half at a kick-off and may not be penalised as being offside in their own half. The intersections between the half-way line and the touchline can be indicated with flags like those marking the corners – the laws…
An assistant referee signals for offside by raising his flag.
An assistant referee signals that the offside offence was in the middle of the pitch; on the far side the flag would be pointed up at 45 degrees and near the assistant referee it would be pointed down at 45 degrees.
J. C. Thring