(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Is there an equation in which I can find the area of a quadrilateral when I know the length of three of the sides and 2 of the angles? Also I really need to find the measurement of the other two angles.

2. Relevant equationsI know the cos and sin formulas of triangles, and may be I can use that but I do not know how to start

The lengths I know are 15, 12 & 2 and the angles I know are 120 degrees between the 12 and 2 and 120 degrees between the 15 and the side I don't know.

3. The attempt at a solution

I really need a nudge to start.. this is a small portion of a much bigger problem.

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# Homework Help: Area of quadrilateral knowing 3 sides and 2 angles

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