@ Find the area of a triangle whose vertices are
C-1,5) (3, 1) and (5,7)
a) 14
b) 13
C) 12
d] 16​

1 thought on “@ Find the area of a triangle whose vertices are<br />C-1,5) (3, 1) and (5,7)<br />a) 14<br />b) 13<br />C) 12<br />d] 16​”

1. Answer

   option a is correct

   Step of explanation

   Since, 1/2[x1(y2-y3) +x2(y3-y1) +x3(y1-y2) ]

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

   1/2(-1*-6+3*2+7*4)

   1/2(-6*+6+28)

   1/2*28

   14

   Reply