5 thoughts on “What’s wrong with this?

  1. Thanks. A good exercise with students is to get them to calculate the total area of the individual pieces for the two big shapes. Then compare that with the area of the big shape if it was made of just one piece. This should then give them a hint as to how the puzzle might be accomplished. Or they could just look really carefully. 🙂

  2. I was thinking that students could calculate the slope of the top lines forming the two smaller triangles. Since the slopes aren’t equivalent, the line forming the top of the third triangle isn’t straight. Our eyes can deceive us, can’t they!

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