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Hi could someone please help me with this question? It would really mean a lot to me:

 

ABCDEFGHIJK is a regular decagon. The rotation centered at G with an angle of a takes D to J. Given that a < 180 degrees, find a.

 

Thank you so much!!!

 Jul 24, 2020
 #1
avatar+110758 
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Why does your decagon have 11 vertices?     A.....K

 Jul 24, 2020
 #2
avatar+110758 
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I get 72 degrees,

I suppose I check it with a GeoGebra diagram.

 Jul 24, 2020
 #3
avatar+110758 
+3

 

decagon rotation,

 

 Jul 24, 2020
 #4
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Thank you so much! That made a lot more sense with the image.

Caffeine  Jul 26, 2020

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