# Quadrilateral: Square & Rectangle

A square has four equal sides and four equal angles (90 degree angles or right angles). A rectangle is a quadrilateral with 4 right angles. It is similar to square except that its sides are not equal.

### Square

**Perimeter of Square**

Perimeter of the square is 4 times the length of the side. For a square of length L, perimeter = 4 * L

**Area of Square**

Area of square is the square of length of the side. Area = L * L

**Properties of Square**

- The diagonals of a square bisect each other and meet at right angles (90 degrees)
- The diagonals of a square bisect its angles
- The diagonals of a square are perpendicular
- Opposite sides of a square are both parallel and equal in length
- All four angles of a square are equal. (every angle of a square is a right angle)
- The diagonals of a square are equal.

### Rectangle

A rectangle is a quadrilateral with 4 right angles. It is similar to square except that its sides are not equal.

**Perimeter of Rectangle**

Perimeter of the rectangle is sum of the length of its sides. Perimeter = 2 * (Length + Breadth)

**Area of Rectangle**

Area of rectangle is multiplication of its length and breadth. Area = Length * Breadth

**Properties of Rectangle**

- All angles are right angles (90 degrees)
- Opposite sides are parallel and equal.
- Diagonals bisect each other.