An equation is given.
A=4π r2
Solve the equation for r .

A) r=4πA2
B) r=A2π
C) r=A4π−−√
D) r=4πA−−√

r =

Step-by-step explanation:

Given

A = 4πr² ( divide both sides by 4π )

= r² ( take the square root of both sides )

= r

step-by-step explanation:

de-gf

hj=3x+20

ji=15x-64

geometry: triangles

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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+

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