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line segment to the nearest half inch is measured using the distance formula.
There are two ways to consider this:You can either consider the position of the ball on the field as the distance from the offensive team's goal line (making the objective to get to the opponent's goal line of reaching 100), or as the distance from the opponent's goal line (making the objective to get to the opponent's goal line of reaching 0).In either case, every advance of the ball adds to the distance, going in the positive direction, and every loss subtracts from the distance, going in the negative distance.The loss of 5 yards on each play would be represented as 3 moves of negative 5, ie 3 moves of 5 to the left on a horizontal number line.The difference comes in where the goal lines are situated on the number line:In the first case (objective to reach 100):You goal line is at 0 and the opponent's goal line is at 100. The value of the position is the distance from your goal line; by subtracting this from 100 you can work out how far is required to go.In the second case (objective to reach 0)Your goal line is at -100 (effectively a loss of 100) and the opponent's goal line is at 0. The absolute value (that is the value ignoring the negative sign) of the position is the distance remaining to the opponent's goal line.The same can be considered for the distance to the next first down; the starting and objective values become 0 and 10 (in the first case), or -10 and 0 (in the second case).
It is equal distance from both.
The equidistant point of a straight line is the middle. Measure the distance from one end to the other and half it.
Three fourths is of EQUAL DISTANCE between them.