Question

if a(-5,7) b(- 4,- 5) C(- 1,-6) and D(4,5) are the vertices of quadrilateral find the area of quadrilateral ABCD

Answer 1

To get the area of quadrilateral
Area of quadrilateral ABCD =area triangle ABC +area triangle ACD


By using the formula
[1/2 x1(y2-y3) +x2(y3-y1) +x3(y1-y2)]


First find the area of triangle ABC
Then find the area of triangle ACD
Then add the area of both triangles



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