Geometry of a Tetrahedron: Question 1: Calculating Surface Area with Cross Products

in hive-196037 •  2 years ago  (edited)


In this video I go over Question 1 of the Discovery Project: Geometry of a Tetrahedron. In this question, we are asked to show that the 4 vectors pointing away from the tetrahedron and with lengths equal to the area of the opposite facing triangles all sum up to equal the 0 vector. In solving this question, I calculate the vectors as cross products, and their lengths as half the length of the cross products. However, for the direction of the resulting cross product vectors, I ensure they are indeed in the direction opposite of the triangular face, so I make the vector components positive or negative accordingly.

This video was taken from my earlier video listed below:

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  ·  2 years ago (edited)

This video was taken from my earlier video listed below: