1. Jun 26, 2018 #1

   Suekdccia

   

   ?

    

   Last edited: Jun 26, 2018

   Suekdccia, Jun 26, 2018
2. 
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3. Jun 26, 2018 #2

   jedishrfu

   

   Insights Author

   Staff: Mentor

   This may answer your question mark
   
   https://www.grc.nasa.gov/WWW/k-12/Numbers/Math/Mathematical_Thinking/observer.htm

    

   jedishrfu, Jun 26, 2018

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