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Permutations and combinations - is square a rectangle?

  1. Dec 8, 2014 #1
    I was going through a p and c problem where I had to find the number of non congruent RECTANGLES.
    Answer includes number of squares as well.
    SHOULD SQUARE BE TAKEN AS A RECTANGLE?
     
  2. jcsd
  3. Dec 8, 2014 #2

    HallsofIvy

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    Staff Emeritus
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    Yes, a square is a special kind of rectangle.

    Of course, I cannot guarantee that whoever set this problem will agree with me!
     
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