What equation would I use to answer this question
A 10 inch TV set also has a width of 8 inches what is its height?

Question

What equation would I use to answer this question
A 10 inch TV set also has a width of 8 inches what is its height?

anonymous · Answer

I get six inches am I correct

anonymous · Answer

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If you have a triangle with a 90 degree angle, you can see it has a hypotenuse, in your case is the diagonal, and 2 catheti. You know that one of them is 8inch. Now you have to use the Pythagorean Theorem, which says:

h^2 = c1^2 + c2^2

where h is hypotenuse and c1, c2 are the catheti. Now plug in the known values:

10^2 = 8^2 + x^2 (call x the unknown cathetus)
x^2 = 100 - 64 = 36
x = sqrt(36) = 6 inch