Can anybody help me? This is due on Friday the 26th but still umm.. the question is Find the radius of a circle with a circumfernce of 2/3.
HELP, and please give me the steps while doing the problem
2007-01-25 12:50:48 · 7 answers · asked by Amy L 2 in Science & Mathematics ➔ Mathematics
and add the answer too
2007-01-25 13:01:26 · update #1
The formula for circumference is:
C = 2pi(r)
All we have to do is plug and solve.
2/3 = 2pi(r)
Divide both sides by 2pi,
(2/3) * (1/[2pi]) = r
1/[3pi] = r
2007-01-25 12:59:22 · answer #1 · answered by Puggy 7 · 0⤊ 0⤋
The circumference of a circle is 2pi times the radius. That means that, if you know the circumference, the radius will be the circumference DIVIDED BY 2pi.
Hence, the radius equals 2/3 divided by 2pi, which equals 0·6667 ÷ 2 ÷ 3·1416 = 0·3333 ÷ 3·1416 = 0·2122
2007-01-25 21:04:10 · answer #2 · answered by deedsallan 3 · 0⤊ 0⤋
The equation for the circumference of a circle is:
2 pi r
you have 2/3 so
2/3 = 2 pi r
1/3 = pi r
1/(3 pi) = r
I hope this helps
2007-01-25 20:59:20 · answer #3 · answered by tval_friedly 2 · 0⤊ 0⤋
C= (2)* (Pi)*Radius
2/3 = 2 * Pi * radius (substituting)
2/(3 * 2 * pi) = r (divide each side by 2* pi) to isolate the radius
1/ (3 * pi) = r (Exact answer)
2007-01-25 21:04:55 · answer #4 · answered by Mafecita 1 · 0⤊ 0⤋
the formula of circumference is c=2PiR
substitute 2/3=2PiR
so R=(2/3)/(2Pi)
R=1/(3Pi)
2007-01-25 21:00:26 · answer #5 · answered by aznskillz 2 · 0⤊ 0⤋
C = 2/3
C = Ï * d
d = 2r
C = Ï * 2r
r = C /2Ï
r = (2/3)/2Ï
r = 1/3Ï
now substitute 3.14159 in for Ï and solve for r
2007-01-25 21:01:55 · answer #6 · answered by bequalming 5 · 0⤊ 0⤋
circunference= 2*pi*r =2/3 so r = 1/(3pi)
2007-01-25 21:01:53 · answer #7 · answered by santmann2002 7 · 0⤊ 0⤋