Area of the triangle is .

Write an expression to represent the area :

                           (Orginal equation)

                (Substitute and in the equation)

Therefore, the expression is .

Here height and base is .

If , then .

Find area of the triangle :

                   (Orginal equation)

                     (Substitute and in the equation)

                               (Multiply)

        (Simplify)

Therefore, area of the triangle is .

The expression is .

Area of the triangle is .