Calculation method: According to 1 inch = 2.54cm, the centimeter of a 55-inch TV is converted into139.7cm, which means that the diagonal of the screen of a 55-inch TV is139.7cm..
Generally, the TV screen ratio is 16:9.
The calculation formula is: (diagonal dimension * 2.54) 2 = (16x) 2+(9x) 2. Let the length of the screen be x cm and the width be 9x/16cm, and x ≈121..
That is to say, the length of a 55-inch TV screen is about 12 1.76 cm, and the width is about 68.49 cm. When the screen ratio is 16:9, the length and width values of TVs with different sizes are: 32-inch TVs are 70.84 cm long and 39.85 cm wide.
Extended data:
Inch (inch) is a unit of length used in the United Kingdom (UK, that is, Britain (Commonwealth) and its former colonies. The English abbreviation is in, 1in=2.54cm, 12 inch is 1 foot, and 36 inch is 1 yard.
The word "inch" comes from the old English word "ynce", which comes from the Latin word "uncia" (meaning "one twelfth"). /kloc-In the 4th century, King Edward II promulgated the "standard legal inch". Its regulation is: choose the three largest wheat grains from the middle of the barley ear, and the length of the head-to-head line is one inch.
In liquid crystal displays, the specifications are generally 17 inch, 19 inch, 23 inch, 27 inch and so on. In mobile phones, the screen sizes are generally 4.0 inches, 4.2 inches, 4.5 inches, 4.7 inches, 4.8 inches, 5.0 inches, 5.2 inches, 5.5 inches, 5.7 inches and 6.44 inches. In a tablet computer, the screen size is generally 7.9 inches, 9.7 inches, 12.9 inches. The size of the display screen is measured by the diagonal length, in inches.
Baidu encyclopedia-inch