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## Sagot :

**Answer:**

square

**Step-by-step explanation:**

Option A is also correct somehow

- These things can be possible in three options

- quadrilateral (Off course)
- Parallelogram
- Square

but we are not sure about first 2 if they have equal sides or angles

only square have each angle 90 and all sides equal

So Option C is correct

**Answer:**

C. square

**Step-by-step explanation:**

__Congruent__ means "the same" (having the same shape and size).

Any four-sided, 2-dimensional shape with straight sides is called a __quadrilateral__.

There are 6 special types of quadrilaterals:

__Rectangle__

- Opposite sides are parallel and equal in length
- All interior angles are 90°

__Square__

- All sides are equal in length
- All interior angles are 90°

__Rhombus__

- All sides are equal in length
- Opposite sides are parallel
- Opposite angles are equal

__Parallelogram__

- Opposite sides parallel and equal in length
- Opposite angles are equal

__Trapezoid__

- One pair of opposite parallel sides

__Isosceles Trapezoid__

- One pair of opposite parallel sides
- One pair of non-parallel sides equal in length
- Two pairs of equal base angles

__Kite__

- Two pairs of adjacent sides equal in length
- The angles included between the sides of differing lengths are equal

**Conclusion**

A four-sided shape that has four congruent angles and sides is a **SQUARE**.