Answer:
1.A rectangle is a four-sided flat shape where every angle is a right angle (90°). Opposite sides are parallel and of equal length (so it is a Parallelogram).
2.four sides
All four sides of a square are equal.
3.Square
Square (regular quadrilateral):
4.four congruent sides
A rhombus is a parallelogram with four congruent sides
5.two pairs
In Euclidean geometry, a parallelogram is a simple (non-self-intersecting) quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure.
