SOLUTION: what is the formula or how do you find the area of a triangle when (3) sides are given?

Algebra ->  Triangles -> SOLUTION: what is the formula or how do you find the area of a triangle when (3) sides are given?      Log On


   

Question 282219: what is the formula or how do you find the area of a triangle when (3) sides are given?
Found 2 solutions by Mathematicians, nerdybill:
Answer by Mathematicians(84) About Me  (Show Source):
You can put this solution on YOUR website!
First find s:
s+=+%28a%2Bb%2Bc%29%2F2
a,b,c are the tree sides
then plug in s into:
A+=+sqrt%28s%28s-a%29%28s-b%29%28s-c%29%29
There you go ;)

Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
.
It is called "Heron's Law":
.
Given that
a, b, and c are the lengths of your triangle
and
s = (a+b+c)/2
then
Area = sqrt%28s%28s-a%29%28s-b%29%28s-c%29%29