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Answer: 36

 

What I did:

 Aug 3, 2019
 #1
avatar+6046 
+2

You've got 8 possible lengths and 8 possible widths.

 

by the congruence restriction a x b is the same as b x a

 

there are 8 squares

 

then there are 8x7 possible rectangles but we only get half of these due to the congruence restriction, so there are 28 rectangles.

 

28+8 = 36

 Aug 3, 2019
edited by Rom  Aug 3, 2019
 #2
avatar+929 
0

Thanks!!!

dgfgrafgdfge111  Aug 4, 2019

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