Question 182195
Television sets. What does it mean to refer to a 20 in TV st or a 25 in TV set? Such units refer to the diagonal of the screen. A 30 in TV set also has a width of 24 inches. What is its height? The height of a 30 in TV would be??????  
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Remember Pythagorus: a^2 + b^2 = c^2
c = the diagonal, and a and b are the width and height
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A TV with a 30" screen and a width of 24"
a = 24
c = 30
b = height
:
24^2 + b^2 = 30^2
576 + b^2 = 900
b^2 = 900 - 576
b^2 = 324
b = {{{sqrt(324)}}}
b = 18" is the height of 30" TV
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