A rhombus is a parallelogram with 4 equal sides
Not normally because their properties are different but they are both quadrilaterals.
Yes, a rectangle is a special kind of parallelogram - one that has a right angle. (You can prove that if it has one right angle all angles are right.)
a crescent has 19 sides
how many sides does an polygonshave
10 sides.
There is no formula for how many sides there are in a polygon; the name of the polygon shows how many sides it has.
How many sides does a Decahedron Have
3Three.
"no" sides.
4 sides
Polygon means "many sides."