Vector question regarding plane and area How do i find the area enclosed within the $3$ points when the plane intersects the $x, y$ and $z$ axis and 
The plane is $ax+by+cz=1$
Need help on solving this as it has been bothering me for some time

Find the points where the plane intersects the $x$, $y$, and $z$ axis. Then find the distances between these three points and use Heron's formula to find the area of the trianlge defined by them.
