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How many different non-congruent isosceles triangles can be formed by connecting three of the dots in a 4 by 4 square array of dots like the one shown below?

 

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Two triangles are congruent if they have the same traced outline, possibly up to rotating and flipping. This is equivalent to having the same set of 3 side lengths.

 Mar 30, 2021
 #1
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https://web2.0calc.com/questions/please-help_50163

 Mar 30, 2021
 #2
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that answer isn't correct

potatooooooo6392487  Mar 30, 2021

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