Try this discussion:
https://www.math.toronto.edu/mathnet/questionCorner/miter.html
a regular triangular pyramid has all of edges of length 36. What is the angle between any two faces of this pyramid.
8 answers
GIVE UP
60 degrees
the answer is 70.529
ur welcome
don't forget to use the degrees symbol
ur welcome
don't forget to use the degrees symbol
wait you go to rsm too
We too
how did u get that answer
u have to imagine a right triangle there.