Question

Find the area of triangle formed by cordanates (0,0) ,(a,0) ,(a,0) ,(0,-b)

Answer 1

(0,0) (a,0) (0,-b)
x1=0 y1=0
x2=a y2=0
x3=0 y3=-b
formula = 1/2 {x1(y2-y3)+x2(y3-y1)+x3(y1-y2)}
1/2 {0(0+b)+a(-b-0)+0(0-0}
1/2{0(b)+a(-b)+0(0)}
1/2{0-ab+0}
1/2(-ab)