Find the circumference of a circle with a radius of 6 inches. Round your answer to the nearest hundredth.
The circumference is about __
inches.

37.7 inches squared

Step-by-step explanation:

The formula for finding the circumfrence of a circle from a given radius is c = 2πr. Since r = 6, plug in 6 in the equation.

c = 2π(6)

Now, solve the equation.

c = 6.28318530718(6)

c = 37.6991118431

Rounded to the nearest hundredth, c = 37.7

Add the label to get your final c = 37.7 inches squared.

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+

25.45584