Yes, the opposite interior angles of a parellelogram are equal.
No, If all angles are equal and all sides are equal, then it is a regular polygon (otherwise it is 'irregular'). In this case, parallelogram is irregular.
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.
square.......
A parallelogram with equal sides is a rhombus. If the interior angles are right angles, it's a square.
Yes. A parallelogram is defined as having opposite sides that are parallel and equal in length, and opposite angles that are equal.
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,
It is a rectangle
rectangle
A square is parellelogram because all the sides are equal.
A square is always a parellelogram since it has equal sides.
yes, a rectangle is a parallelogram with right angles.