Instruction
1
TVs generally come in rectangular shape. So, you need to calculate the diagonal of a rectangle using the settings of your TV screen. Diagonal in any polyhedron represents any segment that connects two vertices that are not adjacent.
2
In order to accurately determine the diagonal of your TV, measure its side. Remember that the screen starts not from the edge. On the edge of the screen, a part of the body, the size of which should be measured on the inner side. You need a diagonal that is screen and not the whole panel of the TV. That is the visible part.
3
Then remember the Pythagorean theorem and using this theorem calculate the desired diagonal. The formula of the Pythagorean theorem is the following: d = √(a2 + b2). d in this formula is the diagonal, a and b are the sides of the rectangle. Substitute the dimensions of the sides of the TV and get the diagonal size.
4
The disadvantage of this measurement is the diagonal of a TV is to measure the length of the sides, with a millimeter precision, you hardly will succeed. To do this with a ruler is difficult. Take some thread or string, stretch it along one of the sides of the TV, and then measure with a ruler. Do the same with the second side. Such a measurement method will be a little more accurate.
5
But if you decided to use a rope or thread, you can try to measure the diagonal without using the Pythagorean theorem. To do this, tighten the thread ends between nonadjacent vertices of a TV screen, and then measure the resulting length with a ruler.
6
To navigate the international dimensions, translate the results obtained into inches. 1 inch is equal to 2.4 cm, So you get the size of the diagonal of your TV set according to international standards.
7
There is another option that will probably be the easiest. Type in any search engine the model of your TV and find all the necessary technical characteristics.