Step 1: Calculate the semi perimeter of the triangle.

            NOTE: First calculate the perimeter of a triangle by adding up the length of  

            its three sides. Then, multiply by \frac {1}{2}

            EXAMPLE: \frac{1}{2} (a+b+c)

                                     \frac {1}{2}{(3+4+5)}

                                     s={\frac {1}{2}}(12) = 6

Step 2: Substitute the values of semi perimeter and lengths of the triangle in the area formula

            FORMULA: Area=\sqrt{s(s-a)(s-b)(s-c)},


            Area = \sqrt {6(6-3)(6-4)(6-5)}

Step 3: Calculate the values in parentheses.

Step 4: Multiply the two values under the radical sign.Then, find their square root.