Answer:
The parallelogram is a "Square" ⇒ (a)
Explanation:
In a parallelogram
- Every two opposite sides are parallel
- Every two opposite sides are equal
- Every two opposite angles are equal
- Its diagonals bisect each other
- If the diagonals of a parallelogram are equal, then it is a rectangle
- If the diagonals of a parallelogram are perpendicular to each other, then it is a rhombus
- If the diagonals of a parallelogram are equal and perpendicular, then it is a square
∵ In a parallelogram, its diagonals bisect each other at right angles
∴ Its diagonals are perpendicular
∵ Its diagonals are equal
→ By using rule 3 above
∴ The parallelogram is a square