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The circumference of a circle is 18pi inches Determine the area of the circle?
Wiki User
∙ 14y ago
First we have to find the radius:
2*pi*radius = 18*pi
Divide both sides by 2*pi to find the radius:
radius = 9 inches
Area of a circle = pi*radius2
Area = pi*92 = 81pi or 254.4690049 square inches
Wiki User
∙ 14y ago
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What is the circumference of a circle whose radius is 9cm?
C=2*pi*r C=2*pi*9 C=18pi C=18*3.141592=56.548656...
For a circle of radius 9 feet find the arc length 's' subtended by a central angle of 18 degrees?
The measure of the central angle divided by 360 degrees equals the arc length divided by the circumference. So 18 degrees/360 degrees=arc length/(9 feet*2pi). 1/20=arc length/18pi feet; arc length=9pi/10 feet. It's refreshing to answer a question that is written with grammatical accuracy!
What is the circumference of a diameter of 18in?
Diameters don't have "circumference." If you want the circumference of a circle with diameter 18 in, then it is just pi*d = 18pi inches.
If a circle is 18 inches in diameter what is the circumference?
The circumference is Pi multiplied by the diameter. In this case, the circumference is 18Pi. We can only approximate this since Pi is an irrational number. The circumference is about 56.55 inches.
What is the circumference of a circle if its area is 81π?
18pi
A circle has a circumference of 18 pi so what is the radius of this circle?
If a circle has a circumference of 18pi, the radius is 9.
What is the circumference of a circle with a diameter of 18?
If the diameter is 18, then the circumference is d*pi or 18pi. 18pi=56.52 if you use 3.14 as pi.
A circle has a curcumference that measures 18pi inches. What is the radius in inches of the circle?
Circumference equals 2 X pi X radius, so work backwards. 18pi=2 X pi X radius divide pi. 18= 2 X radius divide by 2. radius= 9.
What is the circumference of a circle if the diameter is 18 feet?
The circumference of a circle is determined by multiplying the diameter (d) by the number pi. Therefore, the circumference of a circle with a diameter (d) of 18 feet is 18pi or 18x3.14159265358979323846... Roughly 56.54866776461627829228.
Circumference of circle with 18 meter diameter?
if a circle has an 18 meter diameter, then it has a 9 meter radius the circumference of a circle is 2(pi)r so the c. would be 2(pi)(9) which is 18pi. (another way to think of circumference is the diameter times pi)
How do you solve a circumference of a circle is 18 pi?
C = 2 x r x pi Since your circumference is known you can put that into the circumference equation. 18pi = 2 x r x pi Divide 2 and pi from both sides and you get this r = 9 your radius of your circle is 9
What is the circumference of a circle whose radius is 9cm?
C=2*pi*r C=2*pi*9 C=18pi C=18*3.141592=56.548656...
If the volume of a cone is 18pi in cubed and the radius is 3 in then what is the height?
The perpendicular height is 6 inches and the slant height is 6.7082 inches.
If you have a cake recipe that is 6 inches in diameter and 2 inches high but you pour the batter into a round cake pan that is 8 inches in diameter how tall will the cake be?
The volume of the batter is the same. Volume in the 6 in pan: Pi r2 h = 18Pi . Volume in the 8 in pan: 16hPi . Equating the two: 18Pi = 16hPi gives h = 9/8 in.
