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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

  • algebra -

    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

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