Yes, you measure the TV, or monitor screen (computer) diagonally. On the newer flat screens the measurement may be a tad off, but you can get the general idea.
If you mean a TV's actual size, you measure the screen diagonally
Diagonally across the screen. (From top left to bottom right, or top right to botom left.)
The same way you measure a TV screen, diagonally (any corner to opposite corner).
The size of a 37 inch TV is determined by measuring diagonally (from the bottom left corner to the top right corner) across the viewable part of the screen with a tape measure. If the measurement reads as 37 inches then it is a 37 inch TV.
You measure the screen by going diagonal across the screen. Some screens are up to one inch smaller than their advertised size.
55 inches is equivalent to 4 ft and 7 inches.
Screen size is measured diagonally in inches between opposite corners of the screen.
You can use a tape measure or a long ruler. I think the best way to measure a 42 flat screen tv is to use a tape measure though but any other device with a scale on can be used.Screens are always measured Diagonally. Top left to bottom right, or vice versa.
The same way you measure the size of a television screen in any other system of units. TV screen sizes are measured diagonally, from one corner to the opposite corner. The size is usually quoted in centimetres (cm).
A monitor's size is the distance (usually measured in inches) from corner to corner, diagonally across the screen.This applies to widescreen and normal/full screen monitors.However the manufacturer's specified size might be slightly more than the actual 'viewable size' for a couple of reasons:1. They tend to round-up. So what they might call a 24 inch monitor might actually only be 23.5 inches.2. A CRT monitor's size traditionally includes the casing around the screen, for reasons dating back to the invention of the technology decades ago. This doesn't apply to lcd flat panel monitors.See the related link(s) for a more indepth guide and a tool for getting an approximate measurement of a monitor screen size.By Measuring the monitor diagonally this will give you the screen size.The specific models of the laptops usually have uniform sizes of the screens. So, if you know the model number, you can very easily look up its screen size.
Television set sizes are typically given diagonally. That is the diagonal size of the screen, not the entire cabinet. Some manufacturers are now using weasel-words like "40 inch class" when their TV is actually less than 40 inches.
Screen size is measured in inches diagonally from corner to corner ---- Measure from the bottom left corner to the top right, this will give you the correct measurements, however if you have a standard LCD screen, and compare it to a wide screen version, you may get the same measurements as each other, however due to regular programing, you will notice that the right and left hand sides are blacked out because of the conventional non hd-tv formats, so the best way to avoid this issue is to measure your old conventional tv set's height and compare it to the new lcd you wish to purchase, make sure the height it the same, this way when watching standard programing you still get the same viewable screen space as you had with the old tv.