An isosceles triangle has no parallel sides but it does have two equal sides
None.
2
An isosceles triangle has only 1 line of symmetry.
An isosceles triangle has no parallel sides but 2 of its 3 sides are equal in length
None.
An isosceles triangle has 1 line of symmetry
an isosceles has only 1 line of symmetry
Only one line of symmetry, it is the line that contains the median of the isosceles triangle (that passes through the vertex and perpendicular to the base).
The Isosceles triangle only has one possible line of symmetry; and that is through the vortex, AKA: The middle, in a vertical line.
An isosceles triangle has only one line of symmetry
It has 1 line of symmetry