1. Parallelogram
- Has diagonals which bisects each other.
2. Parallelogram
- Its pairs of opposite sides are congruent.
3. Parallelogram
- 105° + 75° is equal to 180°, therefore its consecutive angles are supplementary and is making this quadrilateral a parallelogram.
4. Parallelogram
- It has two pairs of parallel sides
5. Not a parallelogram
- It has no supplementary angles, congruent opposite sides, pairs of parallel sides, and diagonals which bisects each other.
Correct me if I'm wrong. Sana makatulong:)