2
what shape has 4 right angles and 2 pairs of equal sides?
A rectangle is defined as any shape with two pairs of equal sides and four equal angles.
rectangle
A kite, a rhombus, a square must have two pairs of adjacent sides that are equal. Irregular polygon with 5 or more sides can have two pairs of equal sides.
A rectangle
a parallelogram
a quadrilateral
4 sides, 4 vertices, 2 equal angles, 2 pairs of equal sides
A parallelogram is such a shape.
rhombus
A square has 4 right angles, and 2 pairs of equal, perpendicular sides.
Octagon * * * * * 8 pairs means 16 equal sides so it is at least a hexagon.