Do you prefer tea or coffee? Please be serious in answering I just want kind responses please ? (>^ω^<)

To prove that def ~ gfh by the sss similarity theorem using the information provided in the diagram, it would be enough additional information to know that

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters