Respuesta :
Answer:
Rhombus
Step-by-step explanation:
- Parallelogram is a quadrilateral .
- It has both 2pairs parallel and congruent.
- Opposite sides are same

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The only parallelograms which satisfys the condition is :
- Rhombus
It's diagonals are perpendicular and have all other properties of parallelogram, but it's diagonals are not necessarily congruent.