Question

what is the area of the triangle?

Answer 1

http://en.wikipedia.org/wiki/Pick's_theorem
Check this out instead, this makes this super easy.
i=8, b=18
i+b/2-1=8+9-1=16
DONE! :D

Answer 2

that is not any of my choices

Answer 3

answer key

Answer 4

Yeah I know, it is so much more clever :)

Answer 5

i dont get it

Answer 6

I havent given a proper answer for you question. Sorry
Instead I showed you a smart way of doing this problem.

Answer 7

i believe its A

Answer 8

am i right?

Answer 9

I dont know but I will help you now.

Answer 10

So given 3 points A,B,C with coordinates \[(x _{i}, y _{i})\]
i=1,2,3
The area of the triangle is:
\[\frac{ 1 }{ 2 } \left[ x _{1} \left( y _{2}-y _{3} \right) +x _{2}\left( y _{3}-y _{1}\right) +x _{3}\left( y _{1} -y _{2}\right)\right]\]

Answer 11

Also I left out an absolute value function, as the area cannot be -

Answer 12

This should simplify as
\[x _{1}=x _{2}\]

Answer 13

OK I know the solution now, do you?