How does creating the graphs help Tess sort through her thinking about what happened to Nina? Do you think her mother should’ve talked to her no matter what? What helps you sort through your own thinking?

This is a question of a discussion Gide about the book Secrets, Lies and Algebra.

geometry: triangles

solvers

lessons

answers archive

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

about 168 miles

step-by-step explanation: