SOLUTION: hi, Please help me my problem.If a shape that has three sides and three angles,can we call that a triangle?If the sides of the triangles are unsraight lines ,how can we call that?

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Question 184063: hi,
Please help me my problem.If a shape that has three sides and three angles,can we call that a triangle?If the sides of the triangles are unsraight lines ,how can we call that?How can I know its angles and sides by computing?
please ..please..help me...thank you very much for yor answer.Thank you very much!! ! !

Answer by vleith(2517) (Show Source):
You can put this solution on YOUR website!
If a shape that has three sides and three angles,can we call that a triangle? Generally speaking - no. In order to be a 'euclidean triangle' the sides must be line segments. (that is, they cannot be curved). See http://www.mathopenref.com/triangle.html
If the sides of the triangles are unstraight lines ,how can we call that? A 3 sided polygon.
How can I know its angles and sides by computing? I'll assume you mean on a triangle. Use the law of sines --> http://en.wikipedia.org/wiki/Law_of_sines