A trapezoid is a shape that has 4 sides and 2 parallel sides. The sides that are parallel are called the bases.
A square, a rectangle, a rhombus, or a parallelogram.
Trapezoid
Rectangle, Square, Parallelogram
A Rhombus
A 4 sided shape has 4 vertices whereas a 3 sided shape has 3 vertices.
Any 4 sided 2D shape
Square
Trapezium
A 4 sided shape which is a quadrilateral has more vertices than a 3 sided shape which is a triangle
quadralateral
A 4 sided shape