Question

find area of triangle (1,2),(4,2),(3,1)

Answer 1

hey dear your answer is here..

here x1=1,x2=4,x3=3,y1=2,y2=2,y3=1
formula to find area of triangle

=1/2 |(x1(y2-y3)+x2(y3-y1)+x3(y1-y2)|

put values in forula you will get answers

Answer 2

area of a triangle=1/2[x1(y2-y3)+x2(y3-y1)+x3(y1-y2)

1/2[1(2-1)+4(1-2)+3(2-2)

1/2[1(1)+4(-1)+0]

1/2[1-4]

-3/2 Square unit.