- Quadrilateral Definition in Math: A quadrilateral (in geometry) can be defined as a closed, two-dimensional shape which has four straight sides(edges).
- The polygon which has four vertices or corners.
- Interior angles equal to 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 chess board, a deck of cards, a kite, a tub of popcorn, a sign board and in 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 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**

**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

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