Find the measure of the bold angle.- pls help

I am not sure what your "bold angle" is, but x=8.

Step-by-step explanation:

5x+5+16x+7=180

21x+12=180

21x-12=180-12

21x=168

168/21=8

x=8

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

1) letter c.

2) 4 square root of 9

hope this

step-by-step explanation: