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.
Square and Rectangle
Rectangles, of which squares are a special case.
Square and Rectangle
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Square and Rectangle Apex
All rectangles (this includes squares).
If you want to know if they're congruent, its usually a square and a rectangle
Rectangles (including squares).
Only in squares and rectangles. In a rhombus, the consecutive angle is supplementary (sums to 180 degrees).
rhombus