November 10, 2008

This resource has been contributed by Winpossible, and can also be accessed on their website by clicking here - Getting Started - Quadrilaterals.

In this mini-lesson you'll learn; taking help of given examples with solution, the properties of a quadrilateral. A quadrilateral is a four-sided polygon with four angles i.e. anything with four sides that are connected so that a closed figure is obtained and that is a polygon, is an example of a quadrilateral. There are many types of quadrilaterals. The five most common types of quadrilaterals are the parallelogram, the rectangle, the square, the trapezoid, and the rhombus.

You can further understand taking the case of four points*A*, *B*, *C*, and *D* in a plane such that no three of them are collinear and where the line segments *AB*, *BC*, *CD*, and *DA* intersect at the endpoints only, then figure formed by four such line segments is a quadrilateral. Line segment drawn from one vertex of a quadrilateral to the opposite vertex is called diagonal of the quadrilateral. E.g. *AC* and *BD* are the diagonals of quadrilateral *ABCD*. You will also learn in this section that there are many different kinds of quadrilaterals, but all have several things in common. For example, all of them have four sides, are coplanar, have two diagonals, and the sum of their four interior angles equals 360 degrees.

In this mini-lesson you'll learn; taking help of given examples with solution, the properties of a quadrilateral. A quadrilateral is a four-sided polygon with four angles i.e. anything with four sides that are connected so that a closed figure is obtained and that is a polygon, is an example of a quadrilateral. There are many types of quadrilaterals. The five most common types of quadrilaterals are the parallelogram, the rectangle, the square, the trapezoid, and the rhombus.

You can further understand taking the case of four points

This FREE mini-lesson is a part of Winpossible's online course that covers all topics within Geometry. Click on the video below to go through it. If you like it, you can buy our online course in Geometry by clicking here.

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