A(2,1) b(8,1) C(4,3) D(6,6)(adsbygoogle = window.adsbygoogle || []).push({});

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....

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Area of a Quadrilateral

**Physics Forums | Science Articles, Homework Help, Discussion**