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Show that the point A , B and C with pos...

Show that the point `A , B` and `C` with position vectors ` vec a` =3` hat i` - 4` hat j` -4` hat k` = 2` hat i` `j` + ` hat k` and ` vec c` = ` hat i` - 3` hat j` - 5` hat k` , respectively from the vertices of a right angled triangle.

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Show that the point A , B and C with position vectors vec a =3 hat i - 4 hat j -4 hat k vec b = 2 hat i j + hat k and vec c = hat i - 3 hat j - 5 hat k , respectively form the vertices of a right angled triangle.

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