answersLogoWhite

0

The circumference of a circle: C = 2(pi)r

The area of a circle: A = (pi) r^2

C = 25.12 cm

2(pi)r = 25.12 cm

r = 25.12/[2(pi)]

r = 12.56/pi

r^2 = 157.7536/pi^2 So,

A = (pi)r^2

A = (pi)(157.7536/pi^2)

A = 157.7536/pi

A = 50.22 cm^2 (approximately)

User Avatar

Wiki User

16y ago

What else can I help you with?

Continue Learning about Natural Sciences

If the circumference of a circle with a radius of 3.2 cm?

The circumference of a circle when the diameter is 30 is: 94.25


What is the radius in centimeters of a circle that has a circumference of 16pie centimeter?

OK, The circumference of a circle is 2 times pi (3.14) times the radius. SO the radius is = to circumference (5cm) divided by 2 times pi. 5 divided by 6.28 = .796 time 2 gives us a diameter of = 1.59 centimeters. We could also use Pi = cicumference/diameter therefore 3.14=5/x Multiply both side by x and 3.14 x = 5 Divide both sides by 3.14 and you get x= 5 divided by 3.14 which equals 1.59 cm


If the circumference of a circle is 37.68 cm then what would be the radius?

(1/2 (37.68/pi)) _____________________________________________________ The relationship of the circumference to the diameter is π (pi) The formula is... C = π D To make this more useful when you already have the circumference and want to find the diameter... D = C / π So, in this case, assuming a value of π to be 3.142 and giving an answer to the nearest two decimal places... D = 37.68 cm / 3.142 = 12.00 cm As the radius is half the diameter, the answer is 6 cm.


How do you find the inner and outer radii of a circular ring are 6 cm and 9 cm respectively Find the difference between the outer and the inner circumference?

The inner radius is 6 cm, and the outer radius is 9 cm. The circumference of a circle is given by the formula C = 2πr. Therefore, the inner circumference is 2π(6) = 12π cm, and the outer circumference is 2π(9) = 18π cm. The difference between the outer and inner circumferences is 18π - 12π = 6π cm.


What is pipe circumference 19.5 cm in inches?

The circumference of a pipe measuring 19.5 cm is approximately 7.68 inches when converted using the conversion factor of 1 cm = 0.393701 inches.

Related Questions