<PRE><B>Question 132998</B>
What does it mean to refer to a 20-in TV set or a 25-in TV set?
It means the diagonal measurement is 20 in or 25 in.
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 A 15-in TV set also has a width of 12-inches.  What is its height?
Use Pythagoras to get:
height^2 + width^2 = diagonal^2
h^2 + 12^2 = 15^2
h^2 = 225-144
h^2 = 89
h = 9.43 inches
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Cheers,
Stan H.
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