Question 1133263
<pre>
Use Heron's formula:

First calculate 

{{{s=semiperimeter=(PQ+QR+RP)/2}}}

Then use area formula:

{{{area=sqrt(s(s-PQ)(s-QR)(s-RP))/2}}}

Area = 118.3215957 m<sup>2</sup>

You can go here:

https://www.mathwarehouse.com/geometry/triangles/area/herons-formula-triangle-area.php

Edwin</pre>