Yes.
Square and Rectangle
All rectangles, including squares.
All rectangles (this includes squares).
Rectangles, of which squares are a special case.
Only in squares and rectangles. In a rhombus, the consecutive angle is supplementary (sums to 180 degrees).
quadrilaterals are consecutive and opposite angles always congruent?
There are instances that quadrilateral angles can be consecutive and opposite angles are congruent. The best examples are square and rectangle.
No.
Regular polygons have congruent angles such as squares and equilateral triangles.
As all the angles in a square measure 90°, the probability of 2 consecutive angles being congruent is 1.
Right
They may, or may not, be congruent. Congruent means that they have the same measure.