SOLUTION: How many triangles can a decagon be divided into ? Is it 8 or 10 ? Thank you

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Question 584949: How many triangles can a decagon be divided into ? Is it 8 or 10 ? Thank you
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
It can be divided into 10-2 = 8 triangles. So your first choice is correct.