1. Finde the area of the following tringles: (use Logarithms)

A) a=12.7, b=21.5, c=28.6.

i'm not of the answer i got.
i got 127.6
if you got something different can you show me how you did while using logarithms.

2 answers

The fomula to use is

Area = sqrt[p(p-a)(p-b)(p-c)]
where p is the perimeter.

Whether you use logarithms or not to do the calculation is up to you.

Your answer is correct.
In my previous answer, "p" is HALF the perimeter, 31.4.

For additional steps, see
http://askville.amazon.com/Find-area-triangles-logarithms-a%3D12-b%3D21-c%3D28/AnswerViewer.do?requestId=1256937