Why doesn't a triangle have 2 lines of symmetry

For the triangle all of whose sides have length 3, a proper fold through any vertex can serve as a line of symmetry and so there are three possible lines. The triangle with side lengths 2,4,5 cannot have any lines of symmetry as the side lengths are all different.

Step-by-step explanation:

only one type of triangle has one line of summatry because you can fold it in half and they match.

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step-by-step explanation: