Now let's go to vectors in 3D.
Distance formula in space=((x2-x1)^2+(y2-y1)^2+(z2-z1)^2)^1/2
Midpoint=<(x1+x2)/2,(y1+y2)/2,(z1+z2)/2)
Equation of a sphere (x-h)^2+(y-k)^2+(z-j)^2=r^2
This is a 3d coordinate system,
Are you scared? Tomorrow we will continue with more!!!
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