Question

Formula for area of triangle in coordinate geometry

Answer 1

1/2 [x1(y2-y3)+x2(y3-y1)+x3(y1-y2)]

Answer 2

let ABC be a triangle with vertices qA(x1,y1) B(x2,y2) C(x3,y3)

are(ABC)=1/2(x1(y2-y3)+x2(y3-y1)+x3(y1-y2))