Determine the area of quadrilateral ABCD.....? PRE CALC.?

Ye Addis

New member
C = 41 degrees, AB = 13.9, BC = 17.4, CD = 11.2, DA = 8.7

Our teacher didn't even go over this, plus I can't find it in my book :( Can someone please help me do this problem, and can you please explain clearly.

THANKS!
 
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