Yes, quadrilaterals are polygons with four sides, four vertices, and four angles. The sum of their internal angles is always 360°. There are different types of quadrilaterals, each with its own properties. Here are a few common types:

1. Square: All sides are equal, and all angles are 90°.
2. Rectangle: Opposite sides are equal, and all angles are 90°.
3. Rhombus: All sides are equal, but angles are not necessarily 90°.
4. Parallelogram: Opposite sides are equal and parallel, but angles are not 90°.
5. Trapezium (Trapezoid in U.S.): Only one pair of opposite sides is parallel.

Each type of quadrilateral has distinct properties based on its side lengths, angles, and symmetry.

Would you like more details on a specific type of quadrilateral or any particular problem?

Here are 5 related questions to expand your understanding:

1. How can you classify quadrilaterals based on their angles and sides?
2. What are the properties of a kite as a type of quadrilateral?
3. How can you calculate the area of different quadrilaterals?
4. What are the conditions for a quadrilateral to be cyclic?
5. How do diagonals of different quadrilaterals interact?

Tip: When working with quadrilaterals, always check the properties of their sides and angles to classify them correctly.