# What Is a Square? (Mathematics Lesson)

# What Is a Rectangle?

A rectangle is a four sided shape with four right angles.# Properties of Rectange

- Alternate sides of a rectangle are of equal length.

- All angles in a rectangle are right angles.

- Opposite sides of a rectangle are parallel.

- All angles of a rectangle add up to 360°.

- The diagonals of a rectangle are equal in length. They bisect each other.

# The Perimeter of a Rectangle

The perimeter of a rectangle is given by the formula:where b is the length of the base of the rectangle and h is the height of the rectangle.

# The Area of a Rectangle

The area of a rectangle is given by the formula:where b is the length of the base of the rectangle and h is the height of the rectangle.

##### Curriculum

##### Interactive Test

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##### Note

# A RECTANGLE IS A POLYGON

A rectangle is a type of polygon.A polygon is a 2-dimensional shape with straight sides.

A rectangle is an irregular polygon. It has different length sides.

# A RECTANGLE IS A QUADRILATERAL

A rectangle is a quadrilateral.A rectangle is a four-sided polygon.

Parallelograms, squares and trapezoids are also quadrilaterals.