Question

find the area of the triangle whose vertices are (-8,4) (-6,6) and (-3,9)

Answer 1

$area \: of \: the \: triange = 1 \div 2 | - 8(6 - 9) - 6(9 - 4) - 3(4 - 6)|$
$= - 8( - 3) - 6(5) - 3( - 2)$
$= 24 - 30 + 6 \\ = 30 - 30 \\ = 0$