Question: A rectangular tetrahedron has six edges of length a. (a) Show that two opposite edges, such as OA and BC, are perpendicular to each other.

A rectangular tetrahedron has six edges of length a.

(a) Show that two opposite edges, such as OA and BC, are perpendicular to each other.

(b) Use this property and the result obtained in Problem 3.57 to determine the perpendicular distance between edges OA and BC.



A rectangular tetrahedron has six edges of length a. (a)

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