An equilateral triangle has 3 lines of symmetry
It will, unless the shape is symmetrical and the axis of reflection is parallel to the axis of symmetry.
You are an isosceles triangle
Asymmetrical. The answer is NOT irregular. An irregular shape, such as an isosceles triangle does have an axis of symmetry.
There are 3 lines of symmetry ina 6-sided shape.
An irregular trapezium.
A hexagon is the simplest shape, and the only regular polygon, with 6 lines of symmetry.
When referring to the figure and shape of "6", no it does not have any lines of symmetry.