GEOMETRY!! question helpp?

Question

Two circles have the same center. The radius of the larger circle is 3 units longer than the radius of the smaller circle. Find the difference in the circumferences of the two circles. Round to the nearest hundredth.

Answer 1

R1 = r

R2 = r + 3



C1 = 2 * pi * r

C2 = 2 * pi * (r + 3) = 2 * pi * r + 6 * pi





C2 - C1 = 2pi * r + 6pi - 2pi * r = 6 * pi = 18.85

Answer 2

Let r be the radius of the smaller circle. Then the radius of the bigger one is r+3.



You know that C = 2 pi r, so the circumference of the smaller one is 2*pi*r and the circumference of the bigger is 2*pi*(r+3). Subtract the first from the second.

Answer 3

radius 1 = r

radius 2 = r + 3



C = 2 pi r

C1 = 2 pi r

C2 = 2 pi (r+3) = 2 pi r + 6 Pi

C2 is 6 pi larger or 18.85 units

Answer 4

do not hear to alan, he's a liar. this feels greater like a 5 to me. nicely at first something related to a letter could be skipped over, so 0A+4 (0a-8) = 4+0a A+4 (a-8) = 4+a so now we subtract 8 from 4 getting "4" A-4 = 4+a at this element the fours merge right into a single 4 A = 4+a as "a" is the 1st letter interior the alphabet, it equals "a million" so: A = 5

Answer 5

diff=2pi(r+3)-2pi(r)

2pi.r+6pi-2pi.r=6pi