In a class of all girls 24 of the 30 students have brown hair what is the probability of randomly picking a girl with brown hair

answer: 19 is   2

step-by-step explanation: i just looked at your answer and wrote it down

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

yes.. it's proven to be 36.