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How many non-congruent triangles have vertices at three of the eight points in the figure?

 

 Jun 21, 2021
 #1
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+2

I think the best way to solve this is to just start counting.

Sides:

1, 1, sqrt(2)

1, 2, sqrt(5)

1, 3, sqrt(10)

sqrt(2), sqrt(2), 2

sqrt(2), sqrt(5), 4

That's 5. :))

 

=^._.^=

 Jun 22, 2021

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