a man standing 40 m away from a tower noticed that the distance from the tower and the bottom of the flagstaff on top of the tower activities and 45 minutes respectively find the height of the flagstaff​

yes

yes yes yes

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

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8  

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1