Television sets. What does it mean to refer to a 20-in TV set or a 25-in TV set? Such units refer to the diagonal of the screen. A 35 -in TV set also has a width of 28 inches. What is its height?

Question

Physics

Oswaldo Lewis

3 December, 22:55

Television sets. What does it mean to refer to a 20-in TV set or a 25-in TV set? Such units refer to the diagonal of the screen. A 35 -in TV set also has a width of 28 inches. What is its height?

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Answers (1)

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Corbin Hendrix · Answer 1

21 inch

Explanation:

It means that the length of the diagonal of the TV is 20 inch or 25 inch.

Width of TV = 28 inch

diagonal of TV = 35 inch

Let L be the length of the TV

Use Pythagorean theorem

Diagonal^2 = length^2 + width^2

35^2 = L^2 + 28^2

L^2 = 1225 - 784

L^2 = 441

L = 21 inch