**Quadrilateral Definition in Math:**

- The polygon which has four vertices or corners.
- Interior angles equal to [katex]360^\circ[\katex]
- A quadrilateral can be regular or irregular

**We can find the shape of quadrilaterals in various things around us, for example in a chessboard, a deck of cards, a kite, a tub of popcorn, a signboard, and an arrow.**

Quadrilateral Definition in Math

## Types of Quadrilateral

There are many types of quadrilateral (in geometry). As the word, ‘Quad’ means 4 all these types of a quadrilateral have **four sides**, and the sum of angles of these shapes is **360 degrees.**

some quadrilaterals are here

**Trapezium****Parallelogram****Squares****Rectangle****Rhombus****Kite**

**Trapezium**(Quadrilateral Definition)

**Trapezium** actually Describing a geometric shape, has two contradictory meanings:

Outside the **US and Canada**: A quadrilateral with at least one pair of parallel sides (**known in the US as a trapezoid**)

**In the US and Canada:** A quadrilateral with no parallel sides (known elsewhere as a general irregular quadrilateral)

**Trapezium can also mean:**

- Trapezium (bone), a bone in the wrist
- Trapezium (astronomy), a group of stars in the Orion Nebula

** Parallelogram** (Quadrilateral Definition)

The word “PARALLELOGRAM” was derived from the Greek word ‘parallelogrammon’ which means “bounded by parallel lines”. Hence, a parallelogram is a 4 sided figure that is bounded by parallel lines. It is a figure or shape in which the opposite sides are parallel and equal. Parallelograms are classified into three main types:

- Square
- Rectangle
- Rhombus

and each of them has its own unique properties and rules.