Tetrahedron

What is the angle of the sides from the base of a three-sided pyramid where the sides are identical?

Correct answer:

A =  54.7356 °

Step-by-step explanation:

a=1 h1=a2(a/2)2=12(1/2)20.866 x=32 h1=32 0.8660.5774  cos (A) = x/a A=π180°arccos(x/a)=π180°arccos(0.5774/1)=54.7356=54°448"



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