It would be: 20/7 = 2 6/7
In short, Your Answer would be 2 6/7
Hope this helps!
Answer:

Step-by-step explanation:
we know that
Heron's Formula is a method for calculating the area of a triangle when you know the lengths of all three sides.
so

where
a, b and c are the length sides of triangle
s is the semi-perimeter of triangle
we have

<em>Find the semi-perimeter s
</em>
s=
Find the area of triangle



simplify

Step-by-step explanation:
where is the question huh ?
P = 16 because if u add 4 to 14 you will get 18 and minus 2 from it to get 16