area of triangle using 3d vectors

can someone explain how to do this problem, i got the first part correct but i dont understand how to get the area exactly. THanks!

Consider the points below. *P*(1, 0, 0), *Q*(0, -2, 0), *R*(0, 0, -3)

(a) Find a nonzero vector orthogonal to the plane through the points *P*, *Q*, and *R*.

Enter a number.

6http://www.webassign.net/wastatic/common/img/tick.png**i** + Enter a number.

-3http://www.webassign.net/wastatic/common/img/tick.png**j** + Enter a number.

-2http://www.webassign.net/wastatic/common/img/tick.png**k**

(b) Find the area of the triangle *PQR*.

Enter an exact number as an integer fraction or decimal.

3http://www.webassign.net/wastatic/common/img/cross.png

NVM I FIGURED IT OUT THANKS FOR LOOKING AT IT!!