4
An irregular quadrilateral can have zero, one, or two pairs of parallel lines, but typically it has no parallel lines. By definition, an irregular quadrilateral does not have equal sides or angles, which means it does not conform to the properties of specific types of quadrilaterals like rectangles or parallelograms that have parallel sides. Thus, the most common scenario for an irregular quadrilateral is having no parallel lines at all.
1 lines
A rectangle, by definition is an irregular quadrilateral. It has two pairs of parallel sides.
It has 2 symmetry lines
An irregular quadrilateral generally has no lines of symmetry. This is because its sides and angles are not equal or congruent, which prevents it from being divided into mirror-image halves. However, if any specific irregular quadrilateral has certain features, it could potentially have one line of symmetry, but such cases are rare.
the same as a regular quadrilateral, 4
None normally unless it's in the form of a rectangle which has 2 lines of symmetry.
Depending on the triangle, there may be three, one, or none.
Four.
A closed wiggly line. or many irregular polygons such as scalene triangle, ordinary quadrilateral, trapezium (if not isosceles), etc.
A regular quadrilateral has 4 lines of symetry
There can be 4 different acute angles in an irregular 4 sided quadrilateral that all add up to 360 degrees.