Question 182380
A 30-in TV set also has a width of 24 inches. What is its height?
.
You need to apply Pythagorean theorem:
h^2 + w^2 = d^2
where
h is height
w is width
d is diagonal
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Plugging in your numbers:
h^2 + w^2 = d^2
h^2 + 24^2 = 30^2
h^2 + 576 = 900
h^2 = 324
h = 18 inches (height)