How is a square a quadrilateral?
1 Answer
A square is a quadrilateral because it has four sides.
It is a regular quadrilateral because all four sides and angles are equal.
Explanation:
A quadrilateral is any figure with four sides.
Let's take for example a rectangle (because we have to prove it with squares), it has four sides, so it's a quadrilateral.
And as well as a square has four sides, kites, parallelograms, rhombuses, etc. are also quadrilaterals.