Please help with this question, thanks.

<ADB=<CBD

Step-by-step explanation:

it says bisect, meaninf that the angle is split in 2 equal prats, thus the angles are the same size.

only 10/60 isn't equivalent

hope this : )

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+

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