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Television sets: What does it mean to refer to a 20-inch TV set or a 25-inch TV set. Such units refer to the diagonal of the screen. A 25-inch TV set also has a width of 20-inches. What is its height? Height of a 25-inch TV. _______inches
15 years ago

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Ms. Sue
Use the Pythagorean Theorem.

a^2 + b^2 = c^2
a^2 + 20^2 = 25^2
a^2 + 400 = 625
a^2 = 225
a = 15

15 years ago

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