If a = 6 cm, b = 6 cm, and C = 46°, what is the approximate area of ABC?

Answer 1

find side c with the law of cosines:

c^2=a^2+b^2-2abCosC

then, as you know c, find area with Heron's formula.

http://mste.illinois.edu/dildine/heron/triarea.html