= 4.3 + 2.89 + 6.81 = 14 
= 
= √14.75901 ≈ 3.84 
= 8.59 + 7.58 + 6.81 = 22.98 
= 
= √609.7343148 ≈ 24.6928 
= 3.84 + 24.6928 ≈ 28.5 
Find the area of quadrilateral ABCD
...
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