Rhombus
Trapezoid?
There is no specific name for them.
Yes they are. The definition of a quadrilateral is a closed figure with four sides. A square always has four congruent sides and is a closed figure. Therefore, all squares are quadrilaterals. Trapezoids, rhombuses, and rectangles are also quadrilaterals.
squares
rhombus
A parallelogram (and all its special cases) has two pairs of opposite sides that are congruent. An isosceles trapezium has one pair of congruent opposite sides. Selected irregular quadrilaterals can have a pair.
A square and a rhombus are 4 sided quadrilaterals that have congruent sides
Parallelograms, rhombuses, squares, and rectangles are the quadrilaterals that have opposite congruent sides.
square and rectangle
Parallelogram, Rectangle, and Isosceles Trapezoid, opposite sides are congruent.
square and a rectangle
square