- #1

- 5

- 0

let these be 4 points(vertices) of a quadrilateral

so i calculated it out as

2 1

8 1

4 3

6 6

2 1

multiplying diagonal elements

Area = |(2*1-8*1)+(8*3-1*4)+(4*6-3*6)+(6*1-2*6)/2|=7

but the answer is 14 and it gives different answers for different choice of co-ordinate order

so how to judge which one is correct?

any limitation to use this rule?

my heads going crazy over this....