# Thread: Area in 3D plane graph

1. ## Area in 3D plane graph

Find the area described by
$x+y+z=L$ and $0
Is this the SAME area as $x+y+z = \frac{L}{2}$ and $x,y,z>0$?

Thanks~!

2. The first equation is off. x+y+z will be less than 3L/2 but not necessarily less than L/2