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18 August, 11:52

The size of a television is usually indicated by the length of the screens diagonal if a person buys a 20 inch television set that is 12 inches tall how wide is the television

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  1. 18 August, 14:45
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    diagonal = sqrt (a^2 + b^2)

    20 = sqrt (12^2 + b^2)

    20 = sqrt (144+b^2)

    20^2 = 144 + b^2

    400 = 144 + b^2

    256 = b^2

    b = sqrt (256) = 16

    it is 16 inches wide
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