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In football, you have 4 down or attemps to get so many yards, a third down conversion is where you failed to get the amount of yards on first down and second down then reach it on the third, making it first down again
One of the main objectives in American football -- and a necessary one to score points -- is to gain a first down. In order to get a first down, the offense must gain 10 yards within a series of four plays. One problem that football players and officials have always had to deal with is how to measure the 10 yards needed. Even with all of our technology, the NCAA and the National Football League still uses a length of metal chain attached between two poles.
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10 Yards is the First Down.
10 yards
6 yards for first down on first play after that it is 20 yards for each 1st down
10 yards
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On a start of a possession with out any penalties it is 10 yards long.
Ten, unless there was a penalty.
how many yards are left until first down.touch down.
10 yards for a first down