The width and hieght of a tv screen which is 16:9 need to find the diagnol if it is 98 cm wide

I assume you are trying to find to volume (of a container).
Volume of a rectangular prism is length x width x height.
In this case, 19.5 x 13 x 3.5 or 887.25 cm^3.
Good luck.
Paul

Larger as in -- the screen looks fatter. 4:3 stretched to 16:9 or as in Larger as in, screen is longer but thinner? 16:9 / 10 fitting onto ratio 4:3?

Asuming... its the second one -- that ur screen is box 4:3 and the picture is huge 16:9 which is why u need to "zoom out" to get the full picture -- are u sure some idiot didnt mess with the settings and make the tv "zoom in" if it isnt a aspect ratio issue?

... if it is a aspect ratio issue, and ur using 4:3 (small old box televisions) there should be a ratio setting either on ur television OR on ur set top box, that would by defualt with digital tv have wide screen 16:9 -- id suggest finding the settings either on the tv or the set top box or...

just get a bigger tv that supports 16:9 cheap for 50 bucks.

you need to change the 'zoom' on the tv by the remote.
Normal mode frames the 4:3 video to the 16:9 picture area by displaying it in its original aspect ratio, with vertical gray or black bars on both sides of the screen. The disadvantage of this method is the fact that the image is small by virtue of not using the entire width of the screen. This is also known as the 4:3 mode.
Full mode Full mode horizontally stretches the 4:3 video evenly across the entire width of the screen. This is the proper mode to display anamorphic video. If used for standard aspect ratio video, everything on the screen will appear wider than normal. Contrast this with anamorphic video displayed without processing on a 4:3 display, in which people on the screen will appear taller than normal. This is also known as the 16:9 mode.
Zoom mode Zoom mode evenly stretches the picture both horizontally and vertically, until the picture fills the entire width of the screen. This crops out the top and bottom of the picture. This mode is used for letterboxed and open matte video.
14:9 mode Main article: 14:9
In 14:9 mode, the picture is magnified more than in Normal mode, but less than in Zoom mode, while retaining the original aspect ratio.
Wide Zoom mode Wide Zoom mode, also called Just mode, Horizon, or Smart Stretch, progressively stretches the picture horizontally, less in the middle and more on the edges. This allows normal aspect ratio video to be displayed across the entire width of the screen, with minimal cropping, and with much less of the unpleasing visual stretching effect of Full mode.

You can't. There are no adjustments for height and width. Not all programs were shot on 16 x 9 wide screen resolution so it will leave the screen with black spaces . around the edges. Nothing wrong with the TV, and nothing you can do other than the zoom buttons you use now.

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to find the volume of an object you would have to multiply the length x width x hieght for example if an object is 2ft tall 2ft wide and 2ft long your object has a volume of 6 cu. ft

The bulb should be ok. See if the scan assembly moves as it should (even in speed and hieght).

I had the same problem with a 50". The only way I could fix it was to set my Bose system to 4:3 format and the tv to 16:9. Now you can use the zoom to get the right size

good luck

eltjo