as a paralellogram is a skewed square, it is a quadrilateral. it has four sides
Not necessarily. It could be a kite.
A triangle is a polygon with 3 sides
Two examples: an arrowhead or a kite.
A parallelogram is a four-sided plane figure with opposite sides parallel.
They have the same number of sides, namely 4. A square is a special case of a parallelogram. All squares are also parallelograms but all parallelograms need not be squares.
There are 4 right angles in a parallelogram.
Not possible... in order for it to have four right-angles, it would resemble a square or rectangle.
Squares, rectangles, parallelograms, rhombuses, and kites (literally the shape of a kite, where two sides are equal in length and the other two sides are equal in length; however, unlike a parellogram or rhombus, they are not parallel)