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