No, but it can be a parallelogram.
No not every quadrilateral can be a regular polygon.
Some of them are, but not all of them. A parallelogramis a rectangle only if all of its angles are equal.
Yes every square is a regular polygon.
If every side of the polygon is the same length, then it is a regular polygon. If the measure of every internal angle of a polygon is the same as every other, then it is a regular polygon. The two always go together, so you need to check only one of the above criteria.
A parallelagram can be a square, which has four lines of symmetry or a rectangle which has two lines of symmetry but the generic parallelagram has zero lines of symmetry
no it can not
Parallelagram, Rhombus, Square, or Rectangle are the ones with congruent sides. There are also shapes like Trapezoids that do not have equal sides.
A rhombus is a type of quadrilateral, which is a type of polygon.
Yes. Every triangle is a polygon.
Yes in fact every polygon with 3 sides the same is a triangle
Yes it is
a rhombus has all equal sides but a parallelagram only has two equal sides.
Every polygon is 2-dimensional.
Every polygon has two of its sides intersect.