None.
A triangle (not even an equilateral one) has no parallel sides.
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None of the sides of any triangle are parallel. However, you can draw an infinite number of parallel lines inside any triangle.
A triangle can have no parallel lines.
How many lines of symmetry does an equilateral triangle have?
3
In an equilateral triangle: 3 In an isosceles triangle: 1 In a scalene triangle: 0