Question

If A (-5-7) ,B (-4-5) and C (-1-6) ,then find the area of triangle ABC​

Answer 1

Answer:

=½{(x1y2+x2y3+x3y1)-(x2y1+x3y2+x1y3)

=½{-5 -4 -1 -5

-7 -5 -6 -7}

=½{(25+24+7) -(28+5+30) }

=½{56-(63) }

=½{-7}

=3.5 sq. units