If measure QR is 15 cm, and the measure QR is 52.5 cm. Which scale factor was used for the dilation

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incomplete question. how do you expect anyone to you when you do not post the question in its entirety?

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

35x 3= 105

step-by-step explanation:

35+35= 70   70 + 35= 105