# Wide Screen

I had bought 2 screens, both 19-inche.

One is Normal and another is widescreen. I only want to prove that which one has more viewable areas (by Theory).

Normal screen has ratio of wide and height at 4:3 and wide screen 16:9; So if we want to compare easier then change 4:3 to 16:12.

So the diagonal line can be calculated as

`                                                                                               a2 + b2 = c2 While a = width; b=height and c=diagonal;`

thus that:

Normal one will have a coefficient as “A” and wide one will define as “B”

then

`                                                                                                Normal:   (12A)2  + (16A)2  = 192  `

`                                                                                                Wide:      (9B)2  + (16B)2  = 192   `

and then

A2 = 361/400 and B2 = 361/337

`                                                                                               A = 19/20  and  B = 19/18.358 `

`                                                                                              Area = a x b`

Then

`                                                                                                normal: (12 x 19/20) x (16 x 19/20) =  173.28 in2 `

and

`                                                                                                wide:    (9 x 19/18.358) x (16 x 19/18.358) =  154.25 in2 `

So wide screen has less space than normal one. * * 