To find the length of XY, we need to know the coordinates of X, Y, and Z. However, we can use the distance formula to find the distance between X and Y using the information provided.
The distance between X and Z is given as 6, and the distance between Z and Y is given as 12. Therefore, the total distance between X and Y can be calculated as:
distance(XY) = distance(XZ) + distance(ZY) distance(XY) = 6 + 12 distance(XY) = 18
Therefore, the length of XY is 18 units.
I hope this helps!