It’s tongue in cheek - the original site had squares not the advertised “rectangles” - even though a square is a type of rectangle most people consider rectangles to be the non-squares.
My 5-year-old knows that squares are a type of rectangle. Her kindergarten teacher corrected her when she said this during a shapes lesson and told her that rectangles always have two sides longer than the other.
We haven't bothered to correct the teacher, but used it as a lesson to say that even intelligent people aren't always correct about everything.
(She also had a preschool teacher that told her that blood is blue before it gets oxygen. This lesson is one that will be repeated throughout her life.)
There's the technical definition where rectangle is a genus of the species square, and there's the colloquial definition - if there are two boxes and one is a cube and the other is elongated, most people will ask for "the rectangular" one and not the "non square" one.
And an important part of life is learning when to pick your battles.
It’s tongue in cheek - the original site had squares not the advertised “rectangles” - even though a square is a type of rectangle most people consider rectangles to be the non-squares.
My 5-year-old knows that squares are a type of rectangle. Her kindergarten teacher corrected her when she said this during a shapes lesson and told her that rectangles always have two sides longer than the other.
We haven't bothered to correct the teacher, but used it as a lesson to say that even intelligent people aren't always correct about everything.
(She also had a preschool teacher that told her that blood is blue before it gets oxygen. This lesson is one that will be repeated throughout her life.)
There's the technical definition where rectangle is a genus of the species square, and there's the colloquial definition - if there are two boxes and one is a cube and the other is elongated, most people will ask for "the rectangular" one and not the "non square" one.
And an important part of life is learning when to pick your battles.
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