Generally, there are no right angles in a parallelogram, but rectangles and squares can be seen as special parallelograms, as they have all the qualities needed to be classed as parallelograms, and in addition, they have four right angles.
A parallelogram with equal sides is a rhombus. If the interior angles are right angles, it's a square.
Yes, the opposite interior angles of a parellelogram are equal.
Because they are angles that are subtended by pairs of sides that are parallel to each other. There are several ways of proving the angles are equal.
4 right angles, no other angles.
It has 6 angles, none of which are right angles.
rectangle
It is a rectangle
yes, a rectangle is a parallelogram with right angles.
Either 2 or 0
A parallelogram with equal sides is a rhombus. If the interior angles are right angles, it's a square.
Yes, the opposite interior angles of a parellelogram are equal.
All the angles in a parallelogram can be equal, but are not always.
A rhombus. More information... The no right angles is throwing me, but I will add this comment: A square A four-sided polygon having equal-length sides meeting at right angles. The sum of the angles of a square is 360 degrees. A Parellelogram is a four-sided polygon with two pairs of parallel sides. The sum of the angles of a parallelogram is 360 degrees. A Rhombus is a four-sided polygon having all four sides of equal length. The sum of the angles of a rhombus is 360 degrees. So, a Square is actually a Parellelogram and Rhombus as well; and it has 4 right angles. So... I am not sure that Parellelogram and Rhombus are what you were looking for,
square.......
360 degrees
Because they are angles that are subtended by pairs of sides that are parallel to each other. There are several ways of proving the angles are equal.
Parellelogram