Name each of the following parallelograms.
All the sides are equal and one angle is `90^@`.

Answer

To solve the question, we need to identify the type of parallelogram that has all sides equal and one angle measuring 90 degrees.

### Step-by-Step Solution:

1. **Understanding the Properties of Parallelograms**:
A parallelogram is a four-sided figure (quadrilateral) where opposite sides are equal and parallel.

**Hint**: Recall that in a parallelogram, opposite sides are equal and parallel.

2. **Identifying the Conditions**:
The question states that all sides are equal and one angle is 90 degrees.

**Hint**: Remember that if all sides of a parallelogram are equal, it is a special type of parallelogram.

3. **Recognizing the Type of Parallelogram**:
A parallelogram with all sides equal is called a rhombus. However, since one angle is 90 degrees, this particular parallelogram must also be a square.

**Hint**: Think about the properties of a square; it is a specific type of rhombus where all angles are right angles.

4. **Conclusion**:
Since all sides are equal and at least one angle is 90 degrees, the parallelogram is specifically a square.

**Final Answer**: The parallelogram is a **Square**.