2006-06-22 10:09:46 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
summer school is going on. i need help
2006-06-22 10:14:32 · update #1
it says that the answer is 16
2006-06-22 10:18:38 · update #2
A = pi * r^2
In this case r = c / 2pi = 8pi / 2pi = 4
A = pi * (4)^2 = 16pi
2006-06-22 10:18:27 · answer #1 · answered by jimbob 6 · 0⤊ 0⤋
A= Pi (r)^2 .... since the Circumference is 8pi and C = Pi (D) or Pi (2r), then r = 4
A = Pi (4)^2 ... 16Pi
2006-06-22 17:20:54 · answer #2 · answered by icehoundxx 6 · 0⤊ 0⤋
i believe Area=pi times radius squared, correct? and circumference is pi times diameter, correct? So you start with 8(circumference)=pi times diameter, now solve for diameter.It comes out to diemeter divided by pi.Then plug that into Area=pi times radius squared.
2006-06-22 17:21:28 · answer #3 · answered by dogluver8906 4 · 0⤊ 0⤋
C = 2pi * r
8pi = 2pi * r
r = 4
K = (Cr)/2
K = (8pi * 4)/2
K = 8pi * 2
K = 16pi
ANS : 16pi or about 50.265
2006-06-22 18:44:29 · answer #4 · answered by Sherman81 6 · 0⤊ 0⤋
Summner school huh? Shoulda done it the first time.
2006-06-22 17:15:05 · answer #5 · answered by jloos1977 3 · 0⤊ 0⤋
pi*d=8cm
d=8/pi
r=4/pi
A=pi*r^2
A=pi*(4/pi)^2
=pi*16/pi^2
=16/pi
2006-06-22 17:27:30 · answer #6 · answered by kathy s 1 · 0⤊ 0⤋
School is out why are you doing homework?
2006-06-22 17:12:52 · answer #7 · answered by brownieoit 2 · 0⤊ 0⤋
16Ï or 16pi if you don't know what "Ï" is.
2006-06-22 19:20:05 · answer #8 · answered by Hot T-Bone 4 · 0⤊ 0⤋