# Question #3ccba

##### 1 Answer

In order to prove this i am assuming that s is the semiperimeter of the triangle #

ok so first let

on solving for

Now ,

and we know that

As Arithmetic mean of

so ,

Hence

In order to prove this i am assuming that s is the semiperimeter of the triangle #

ok so first let

on solving for

Now ,

and we know that

As Arithmetic mean of

so ,

Hence