Question

Formula to find the area of a quadrilateral in a coordinate plane..
(who first ''types'' the formula will be marked as brainliest answer)!!!
also i have awarded 15 points!!!!....

Answer 1

Answer:

A=1/2{(x1×y2 + x2×y3 + x3×y1)-(x2×y1 + x3×y2 + x1×y3)}

Answer 2

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Answer:

A=1/2{(x1×y2 + x2×y3 + x3×y1)-(x2×y1 + x3×y2 + x1×y3)}