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**Quadrilateral**:

A quadrilateral is a closed figure of exactly \(4\) sides.

Before getting to constructing quadrilaterals, it is essential to know the properties of each of the quadrilaterals.

Properties of a parallelogram

**1.**A parallelogram has equal and parallel opposite sides.

**2.**The diagonals of a parallelogram always bisect each other.

Properties of a rhombus

**1.**All sides of a rhombus are equal.

**2.**The opposite sides of a rhombus are always equal and parallel.

**3.**All angles in a rhombus are always at \(90\) degrees.

**4.**The diagonals always bisect each other and cut each other at right angles.

Properties of a rectangle

**1.**In a rectangle, the opposite sides are equal and parallel.

**2.**All angles in a rectangle are always equal and are always of \(90\) degrees.

**3.**The opposite angles are always supplementary; that is, they sum up to \(180\) degrees.

Properties of a square

**1.**All sides in a square are equal.

**2.**All angles in a square are equal and are of \(90\) degrees.

**3.**The opposite sides in a square are always equal and are always parallel to each other.

**4.**The opposite angles are always supplementary; that is, they sum up to \(180\) degrees.

**5.**The diagonals bisect each other and always cut each other at right angles.