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Let's go through each statement and determine whether it's true (Cierto) or false (Falso):

1. **Cada cuadrado es un paralelogramo.**  
   **True (Cierto)**.  
   Explanation: A square is a special type of parallelogram where all sides and angles are equal.

2. **Cada rectángulo con cuatro lados congruentes es un cuadrado.**  
   **True (Cierto)**.  
   Explanation: If a rectangle has four congruent sides (meaning all sides are equal), it is also a square, since squares have both equal sides and right angles.

3. **Cada paralelogramo es un cuadrado.**  
   **False (Falso)**.  
   Explanation: Not every parallelogram is a square. Parallelograms include shapes like rectangles and rhombuses, which don't necessarily have all sides equal or all angles as 90°.

4. **Cada cuadrilátero es un paralelogramo.**  
   **False (Falso)**.  
   Explanation: Not all quadrilaterals are parallelograms. For example, trapezoids are quadrilaterals but not parallelograms, as they don't have two pairs of parallel sides.

Would you like more details on any of these concepts?

Here are five related questions:
1. What properties define a parallelogram?
2. How can we distinguish between a rectangle and a square?
3. Are all rhombuses squares?
4. What are examples of quadrilaterals that are not parallelograms?
5. How do the angles in a parallelogram relate to one another?

**Tip:** Always remember that a square is a specific case of a parallelogram, where all sides and angles are equal!

Cada cuadrado es un paralelogramo. Cada rectángulo con cuatro lados congruentes es un cuadrado. Cada paralelogramo es un cuadrado. Cada cuadrilátero es un paralelogramo.

This page covers the properties of squares, parallelograms, rectangles, and quadrilaterals. It answers whether every square is a parallelogram, if a rectangle with four congruent sides is a square, and more. Suitable for Grades 6-8 students.

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