Maybe they are bisector, median, altitude and the middle perpendicular.
(I hope I put it in English right :)
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straight, curved, zigzag, and bent.
A triangle has 3 lines of symmetry.
a equilatral triangle has at least up to 4 lines of symetry
There are no parallel lines in a triangle !
An equilateral triangle contains at least 2 lines of symmetry (it actually contains 3 lines of symmetry). An equilateral triangle is also radially symmetric.If the question is "Is there a triangle with exactly 2 lines lines of symmetry?", the answer is no.