Quadrilateral with two pairs of consecutive sides congruent and no opposite sides congruent.
Now, we can go through each of them and see whether our quadrilateral meets the description.
Quadrilateral
Does CDEF meet the definition?
Reasoning
Parallelogram
No
The opposite sides are not marked as parallel.
Rhombus
No
There are only two congruent sides, not four.
Rectangle
No
The angles seem to be right angles, but they are not marked as such.
Square
No
Not all sides are congruent and the measures of the angles are unknown.
Trapezoid
No
None of the sides are marked as parallel.
Isosceles Trapezoid
No
It is not a trapezoid.
Kite
No
One pair of opposite sides is congruent.
As we can see, we do not have enough information to specify CDEF as some kind of quadrilateral. All we know for sure is that CDEF has four sides and four vertices, so the most specific name we can give it is a quadrilateral.
