Question

side of the triangle are 22cm 20 cm and 18 cm find its area

Answer 1

Given:
           sides of a scalene triangle = 22 cm, 20 cm and 18 cm.
           lets take a = 22
                         b = 20
                         c = 18
Formula:

area of a scalene triangle = √s(s-a)(s-b)(s-c)
                            where s = a+b+c/2
                                       s = 30

ie √30(8)(10)(12) is the area of the triangle
    = √28800
    = 169.7 cm²

Hope this helps....