Question 1209091
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Since the lengths of all three sides are given, apply the Heron's formula to get the area.


It is pure mechanical calculation.


<U>ANSWER</U>.  204 cm^2.


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In the &nbsp;Internet, &nbsp;you can find many online calculators for the Heron' formula.


To save my brain, &nbsp;I used one of them  https://www.mathopenref.com/heronsformula.html


In addition to making calculations, &nbsp;it explain the formula itself, &nbsp;so &nbsp;I &nbsp;have nothing to add to it.



On the Heron's formula, &nbsp;see my lessons

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Surface-area/-Proof-of-the-Heron%27s-formula-for-the-area-of-a-triangle.lesson>Proof of the Heron's formula for the area of a triangle</A>  

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Surface-area/One-more-proof-of-the-Heron%27s-formula-for-the-area-of-a-triangle.lesson>One more proof of the Heron's formula for the area of a triangle</A>  

in this site.


Read, &nbsp;learn and have fun.