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'Is a Square a Rectangle?' printed from http://nrich.maths.org/

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We have had a solution from someone who unfortunately didn't give his or her name, but it says that there are $14$ different rectangles:

rectangle 1

1

rectangle2

2

rectangle 3

3

rectangle4

4

rectangle5

5

rectangle6

6

rectangle7

7

rectangle8

8

rectangle9

9

rectangle10

10

rectangle11

11

rectangle12

12

rectangle13

13

rectangle14

14



Rectangles 1 and 4 are the same as each other.
Rectangles 5, 8, 10 and 12 are the same as each other.
Rectangles 6 and 11 (which are squares) are the same as each other.
Rectangles 3 and 13 are also squares but they are not the same as each other. They are similar to 6 and 11.
Rectangles 2, 7, 9 and 14 are different to each other and not similar to any other rectangle.