12pie cm squared
24pie cm squared
120pie cm squared
144pie cm squared
240pie cm squared
2006-10-18 06:34:44 · 5 answers · asked by justin j 2 in Science & Mathematics ➔ Mathematics
2piR = C => R = C/(2pi)
A = piR^2 = pi(C/(2pi))^2 = piC^2/(4pi^2) = C^2/(4pi)
substituting:
= (24pi)^2/(4pi) = 24^2pi/4 = 144pi cm^2
2006-10-18 06:39:15 · answer #1 · answered by Anonymous · 0⤊ 0⤋
circumference of a circle = pi * diameter
If the circumference is 24*pi, then the diameter is 24 cm
area of a circle = pi * r^2 where r is the radius
radius = 1/2 the diameter = 12 cm
area of this circle = 144 * pi cm squared
2006-10-18 06:40:21 · answer #2 · answered by mortgagelns 3 · 0⤊ 0⤋
circumference of a circle = 2pie r i.e 2pie r = 24pie or 2r = 24 or r = 12 area of circle = pie r square i.e 144 pie cm square.
2006-10-18 06:40:55 · answer #3 · answered by vaishali 2 · 0⤊ 0⤋
144
2006-10-18 06:37:23 · answer #4 · answered by nari 3 · 0⤊ 0⤋
circum = 2*pi*r
area = pi*r*r (pi * r squared)
24*pi = 2*pi*r
r = 12
area = pi * 12 * 12 = 144*pi~= 452.3893 cm squared
2006-10-18 06:46:14 · answer #5 · answered by schvan 2 · 0⤊ 0⤋