Question

Angle between 2 edges of regular tetrahedral (maths 3d)

Answer 1

Answer:

Thus, from triangle DEC, we can say that cosθ=DECD . From the distance formula, we can say the that the length of DE is 12√3 and CD is √32 . Therefore, the angle between two faces is cos−113 .

Step-by-step explanation:

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Answer 2

❥︎❥︎Thus, from triangle DEC, we can say that cosθ=DECD . From the distance formula, we can say the that the length of DE is 12√3 and CD is √32 . Therefore, the angle between two faces is cos−113 .