Question

find area of triangle whose vestices are (2,7),(1,1),(10,8)​

Answer 1

formula of triangle: base times height divided by 2

1) 2 times 7=14 divide by 2=7

2)1 times 1=2 divide by 2=1

3)10 times 8=80 divide by 2=40

plz mark brainliest and hope it helps!!

Answer 2

Answer:

(x₁y₁)=(2,7);(x₂y₂)=(1,1);(x₃y₃)=(10,8)

Step-by-step explanation:

area of triangle=x₁(y₂-y₃)+x₂(y₃-y₁)+x₃(y₁-y₂)

2(1-8)+1(8-7)+10(7-1)

-14+1+60=47