Answer :

Here we have the quadrilateral formed by the points (1,1), (0,1), (0, 0)and (1, 0).

We have to calculate the Area of the quadrilateral with vertices as A(1,1), B(0,1), C(0, 0)and D(1, 0)

Let us divide the quadrilateral into 2 triangles,so Area of the quadrilateral will be sum of Areas of two triangles.

Let us say one ∆ is ABC and other ∆ is ADC

Now Area of ∆ABC is

When we substitute the values of the coordinates of the vertices

as A(1,1), B(0,1), C(0, 0),we get

⇒

Now Area of ∆ADC with vertices A(1,1), D(1, 0)

C(0, 0) is

⇒

Hence area is 1 sq.units.

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