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.help

 Jun 18, 2020
 #1
avatar+21955 
+1

For this problem the "three-dimensional" Pythagorean Theorem states:

             x2 + x2 + x2  =  202  

 Jun 18, 2020
 #2
avatar+245 
+1

apply the Pythagorean Theorem 

 Jun 18, 2020
 #3
avatar
+1

(√2 * x)² + x² = 20²

 

3x² = 400

 

x² = 400 / 3

 

x = 11.547   smiley

 Jun 18, 2020

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