Treat the sides of the quadrilateral as vectors What is the

Treat the sides of the quadrilateral as vectors. What is the sum of A+B+C+D? Note: Although the vectors aren\'t assigned a value you should be able to find a numerical answer.

Solution

Answer is 0

Let A + B = M

and M+ C = N we can see that the resultant N is in exactly the opposite direction of D

A+B+C+D= M+C +D= -D+D = 0