Quote:
Originally Posted by youngump
I'm not sure quite why. To any throw there are two 90 degree angles. And two 180 degree angles (one standing in the path of the throw and one beyond the throw. On any throw to 1st or 3rd one of the 90's will be fair, and one foul and one of the 180's will be fair and one foul. No?
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Think about it. It helps if you draw it out.
If the umpire moves 45 degrees (fair or foul, doesn't matter) to get to a 90 degree angle with the throw, then he was 135 degrees to the throw to begin with. Moving 45 degrees in the opposite direction would make that angle 180 degrees, which would put him in line with the throw.
He would have to move 135 degrees in that opposite direction to be "mirrored" to see the throw from the other 90-degree angle.
Let me give you more of a visual: Suppose the throw was coming from F6 while she is standing on the foul line halfway between third and home. If the umpire only moves 45 degrees in foul territory to get the 90, then he had to have started out 45 degrees from the foul line in foul territory. Moving from that same position 45 degrees towards fair territory would put him on the foul line beyond third base. He would have to move an additional 90 degrees to get the 90 from fair territory.