Then ∠ EDA = ∠ DAE = 45 degrees
So de = AE = 3 times the root number 2 meters.
From Pythagorean theorem,
AD square = AE square +de square
Square of AD = 36
AD=AB=6
Because ∠ C = 90 degrees, ∠ BAC = 60 degrees,
So ∠ CBA = 30 degrees
So AC = 1/2 AB = 3.
BC squared = AB squared -AC squared
=36-9
=27
Bc = 3 times the root number 3