Answer:
23.82
Explanation:
1) if the coordinates are: A(-5;4), B(0;3), C(4;-1) and D(4;-5), then it is possible to calculate the sides of the given quadretarial;
2) AB=sqrt(26)≈5.1; BC=sqrt(32)≈5.66; CD=4; AD=sqrt(82)≈9.06;
3) the required perimeter is: AB+BC+CD+AD=5.1+5.66+4+9.06=23.82 (units)