Donna claims: “To get from A to B, I can move over 3 and up 4. To get from C to D, I can move over 2 and up
5. Since both of these paths are 7 units long, AB = CD."
Explain to Donna why her reasoning is incorrect. Use
diagrams, words, and/or equations in your explanation.

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm

The answer is the numbers between =5 and 5