use law of cosines to find a:
a^2 = b^2 + c^2 - 2abCos(A)
use law of sines to find B:
a = b
--- -----
sin A sin B
C = 180 - A - B
use law of cosines to find a:
a^2 = b^2 + c^2 - 2abCos(A)
use law of sines to find B:
a = b
--- -----
sin A sin B
C = 180 - A - B
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