Question

Are All Squares Parallelograms?

Answer 1

Yes. All squares are parallelograms.

The property of a parallelogram is that opposite sides are equal in length and opposite angles are equal, and same-Side interior angles (consecutive angles) are supplementary.

Since squares have all sides are equal in length that means opposite sides are also equal.

Square has all angles equal to $90°$that means opposite angles are equal, and same-Side interior angles (consecutive angles) are supplementary.

So, a square satisfies the properties of a parallelogram.

Hence, all squares are parallelograms.