The ratio of YZ to UV is 2:1
1) Considering that the distance between YZ is 4√5 and the distance between points U and V is 2√5 the ratio of YZ to UV can be found through this:
2) Let's rationalize it by multiplying both numerator and denominator by √5 to simplify removing the radicals on the denominator.
3) So the ratio of YZ to UV is 2:1