How do you use ratios to determend whether two shapes are similar?

First of all, this subject is supposed to be geometry. The answer is that if he ratios are similar then the angles will be the same proving similarity

You not be doing this in a quiz. if you actually studied your work you would know the answer. the answer though is that they would use gdp per capita because it measures a smaller portion (person). this could show individual growth per person in the country.