How many (non-congruent) isosceles triangles exist which have a perimeter of 10 and integer side lengths?
<|im_start|>system
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<|im_start|>user
How many (non-congruent) isosceles triangles exist which have a perimeter of 10 and integer side lengths?
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<|im_start|>assistant

user
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How many (non-congruent) isosceles triangles exist which have a perimeter of 10 and integer side lengths?
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