Area of a quadrilateral

Objectives

To find the area of a quadrilateral

Estimated Time

40 minutes

Prerequisites/Instructions, prior preparations, if any

Prior understanding of properties of triangles

Materials/ Resources needed

• Digital : Computer, geogebra application, projector.
• Non digital : Worksheet and pencil
• Geogebra files : ‘Area of a quadrilateral.ggb’

Download this geogebra file from this link.

Process (How to do the activity)

• How can the quadrilateral be divided into triangles?
• What is common for the two triangles formed?
• How can the area of the quadrilateral be found with the two triangles that are formed?
• Record the values of segments

Value of diagonal AC (f)	Value of h	Value of j	Area of triangle ABC	Area of triangle ADC	Area of Quadrilateral
.
.

Evaluation at the end of the activity

• Can the area of any quadrilateral be found with this method