for this question you would need to utilize ratios to find the side lengths. For example, set up a ratio between the big triangle with the small triangle to find a side length
2/5 at the top nd bottom, but 0/5 on the sides. So 2/5 + 0/5= 1/5
And you know right this girl has how many years of the first type of quantity of correspond to one unit of the second type of quantity
this is the answer you can try it to see if it works
