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avatar+4677 

Help 2

 Dec 17, 2018
 #1
avatar+3715 
+2

Hmm, is it (A), isometry?

 Dec 18, 2018
 #2
avatar+812 
+1

Yes, I think it is isometry. Isometry changes the direction by rotation, reflection, translation, ect. The original size of the shape does not change.

 Dec 18, 2018

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