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T4. (Area of a Triangle) See if you can program your technology utility to find the area of the triangle in 3-space determined by
three points when the user enters their coordinates. Check your work by calculating the area of the triangle in Example 4.
T5. (Triple Scalar Product Formula) If you are working with a CAS, use it to prove Formula 7 by showing that the difference
between the two sides is zero.
T6. (Volume of a Parallelepiped) See if you can program your technology utility to find the volume of the parallelepiped in
3-space determined by vectors u, v, and w when the user enters the vectors. Check your work by solving Exercise 10 in
Exercise Set 3.4
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