Concave is a property of [irregular] polygons. A parallelogram cannot be concave.
Yes.Yes.Yes.Yes.
They are both convex polygons.
Squares and rectangles.
No because a triangle has 3 sides whereas a parallelogram has 4 sides but they are both types of polygons
These are all names of polygons.
Polygons
A hexagon and a parallelogram are both polygons that have exterior angles that add up to 360 degrees
There are many types of polygons to memorize. A parallelogram is a quadrilateral, where the opposite or facing sides are equal in length and the opposite angles are equal.
It could be one of many irregular polygons with 4 or more sides.
square, rectangle, rhombus, parallelogram
The circle - the rest are polygons.