Question

I want to find the area of triangle whose certices are(3,4),(0,5),(2,-1)and(3,-2)

Answer 1

we know that ,
1/2 ( x1 (y2- y3)+x2 (y3-y1) +x3( y1-y2)
= 1/2( 3 (5+1) + 0 (-1 -4) + (-1 -5)
= 1/2 (3(6) + (-6)
= 1/2 (18 - 6 )
= 1/2 (12)
=6
answer