Question

find the area of triangle whose vertcies the are. [1,1] [5 2] [4,12]​

Answer 1

HEY MATE HERE IS YOUR ANSWER

SEE THE ATTACHMENT

HOPE THIS MAY HELP YOU

Answer 2

area of triangle= 1/2(1(2-12)+5(12-1)+4(1-2)

1/2 (1×(-10)+5×11 + 4×(-1)

1/2 (-10+55-4

1/2 ×41

= 20.5