Question

Find the area of quadrilateral ABCD whose vertices are A(3,_1),B(9,_5),C(14,0)and D(9,19) .

Answer 1

first find the area of triangle ABC and then find area of triangle BCD
Then to find area of quadrilateral add the areas of those both triangles
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actually I am not in my home present so I am telling the procedure to do sry for not dng calculation