SOLUTION: How many sides could a regular polygon have if all of its diagonals are congruent? (I need an answer by 2/20)

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Question 843625: How many sides could a regular polygon have if all of its diagonals are congruent? (I need an answer by 2/20)
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Only 4. If the polygon has five or more sides () then does not have the same length as , for example. n = 3, the equilateral triangle, technically works, but it is vacuous since a triangle has no diagonals.