Note that if a plane has equation ax + by + cz + d = 0, then the plane's normal vector is <a,b,c>. You can rewrite the equation into the form <a,b,c> * (<x,y,z> - <x0,y0,z0>) = 0.
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To add to this^, we may have to compute the normal vector by taking the cross product of two arbitrary vectors on the plane (using 3 of the vertices) just like we did in project 2.
Note that if a plane has equation ax + by + cz + d = 0, then the plane's normal vector is <a,b,c>. You can rewrite the equation into the form <a,b,c> * (<x,y,z> - <x0,y0,z0>) = 0.
To add to this^, we may have to compute the normal vector by taking the cross product of two arbitrary vectors on the plane (using 3 of the vertices) just like we did in project 2.