SOLUTION: Find D in the simplest radical form. Right square pyramid with equilateral trianglar faces. The sides and base are all 8. d is in the middle of the pyramid with a dotted line down

Question 463993: Find D in the simplest radical form. Right square pyramid with equilateral trianglar faces. The sides and base are all 8. d is in the middle of the pyramid with a dotted line down the middle. I am just super confused on how to do this problem. I have tried to find the formula in my textbook but can't figure it out. Thank you
Answer by cleomenius(959) (Show Source): You can put this solution on YOUR website!
I believe we are looking for the long side of a 30 60 90 triangle.
The short side is 4, the hypotenuse is 8, the long side (what we need) is therefore s radical 3 / 2, this works out to 2 radical 3.
I believe this is the d we are looking for.
Cleomenius.
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