Part A Mark the focus of the parabola you are going to create at F(6,4). Draw a horizontal line that is 6 units below the focus. This line
will be the directrix of your parabola. What is the equation of the line?

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step-by-step explanation:

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

answer:

a=9

step-by-step explanation: lmk if you need a explanation