Geometry

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The sum of the squares of the measures of the sides of a square is 256. Find the measure of a diagonal of the square.

  • Geometry -

    sqrt(256) = 16

  • Geometry -

    the answer in the book says 8 sqrt of 2. i don't know how to solve it though

  • Geometry -

    OH !
    they mean all four sides!

    256/2 = 128
    128 = 64*2 = 8*8*2
    sqrt(128) = 8 sqrt 2

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