# Math Help - inequality in 3d

1. ## inequality in 3d

I am not sure how to form an inequality for the region with a distance from the point (1,1,1) that is less than 2 and lie above the xy plane

The first part I have $(x-1)^2 + (y-2)^2 + (z-1)^2 < 2$
I don't know how to include the second part as an inequality

Thanks!

2. Hi

First the ordinate of the point being 1 the first part is $(x-1)^2 + (y-1)^2 + (z-1)^2 \leq 4$

The second part is $z \geq 0$