Question

Find area of a triangle whose vertices are (1, 2),( 3, 7), (5, 3)

Answer 1

Step-by-step explanation:

apply area of triangle formula of vertices

Answer 2

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

putting values in this

Here x1=1 , x2=3 , x3=5

y1=2 , y2=7 , y3=3

1/2(1(7-3)+3(3-2)+5(2-7)

=1/2(4+3-25)

=1/2(-18)

=-9