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why are tv.'ssize measureddiagonallysaying a 15ins then when you measure the screen horizontally you lose about 4ins the same when measured vertically who's kidding the public ? come on.

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maillme | 17:36 Mon 26th Feb 2007 | Film, Media & TV
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about tv's measuremants
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All TVs are described using the diagonal measuremant so why do you feel that the public is being kidded?
tv screen are measured from corner to corner
The problem with using diagonal measurement is that it does not differentiate between aspect ratios.

e.g.

a 30" standard TV screen (4:3) is around 18" tall

a 30" widescreen TV screen (16:9) is only 16�" tall

In other words, a widescreen TV needs to have a diagonal screen measurement around 9% larger than its nominal 4:3 equivalent to actually have a viewable area of the same height.
We bought a tv from argos,19inch screen,we measured it horizontally and thought that argos had made a mistake,Kicked right off with them we did, it wasnt till the next day when I told me mum,she put us straight. oops sorry.
it would make a lot more sense if they gave both width and height; but the diagonal measurement dates from the days when all screens were in the same proportion. They aren't now but widescreens are always advertised as such, as far as I know (because it's a selling point), so I don't think anyone's really being robbed here. A 30 inch screen is bigger than a 20 inch one.

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why are tv.'ssize measureddiagonallysaying a 15ins then when you measure the screen horizontally you lose about 4ins the same when measured vertically who's kidding the public ? come on.

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