Question

Find the area of a triangle, two sides of which are 13cm and 14cm and
the perimeter is 42cm

Answer 1

Answer:

Let x be the another side.

      13+14+x=42

                  x=42-27

                  x=15cm

By applying herons formula

                       s=a+b+c/2

                       s=13+14+15/2

                       s=42/2

                       s=21

area of triangle=√s(s-a)(s-b)(s-c)

                        =√21(21-13)(21-14)(21-15)

                        =√21*8*7*6

area of triangle=84cm².

Step-by-step explanation:

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