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Subjects>Math>Other Math

If the radius is 4cm what is he circumference?

Updated: 4/28/2022

Wiki User

∙ 15y ago

Best Answer

Circumference of a circle is C=2pir

C=2pi(4)

C=8pi

C=25.12 cm

Where pi is the ratio of the circumference to the diameter of any circle, approximately 3.14. There is usually a button for pi on scientific/graphing calculators.

Wiki User

∙ 15y ago

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Continue Learning about Other Math

Radius from circumference?

The radius is 1/2 of the circumference.

IF The circumference is 20 what is the radius?

If the circumference is 20 the radius is 3.18

If the circumference is 34.54 what is the radius?

If the circumference is 34.54, the radius is 5.497211734394065.

How do you work out the area of a circle given the diameter?

you half the diamater to get the radius, then you square the radius. Then you times it by 3.14. Always. example. Diameter=4cm then radius =2cm squared=4cm 4x3.14=12.56

What is the cross sectional area of the 4 pipe?

Method to find area of a circle is: The area of a circle is its radius squared times pi. Assuming the pipe has a diameter of 4cm: radius = 2 cm Circumference = 12.5664 cm Area = 12.5664 cm2

Related questions

What is the circumference of a circle with a radius of 4cm?

The circumference of a circle with a radius of 4cm is: 25.13 cm (r x 2 x pi)

What is the circumference of a 4cm circle?

Circumference of a circle = 2*pi*radius or diameter*pi

Find the ratio of the circumference of 4Cm?

The ratio of the circumference of a circle with radius 4 cm to its area is 1:2.

How do you find the circumference an you have radius?

C=3.14*d<----diameter d=r*2 ex: what is the circumference of a circle if the radius is 4cm? 4*2=8cm 3.14*8=25.12cm c=25.12cm

What is the circumference of a circle with a 4cm radius?

Circumference equals 2 x the radius x pi. 4(2) = 8 So, the circumference is 8 pi. However, if you want to calculate the actual value, multiply those two together and you get roughly 25.1.

What is the diameter of a circle whose radius is 4cm?

radius=4cm diameter=8cm *radius is half the diameter

What is the circumference of a circle if the diameter is 4cm?

Circumference = Pi X Diameter = 3.1415 X 4cm = 12.566cm

What is volume cylinder of radius 4cm and height 2cm?

A cylinder with a radius of 4cm and a height of 2cm has a volume of 100.53cm3

What is the circumference of a circle when the diameter equals 4cm?

A circumference of 12.57 cm

What is the Volume of cylinder with radius of 4cm and height of 10cm?

The Volume of cylinder with radius of 4cm and height of 10cm is: 502.65 cm3

How do you calculate the radius of a quadrant?

4cm

What is the circumference for d equals 4cm?

circumference of the circle = 4*pi cm

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If the radius is 4cm what is he circumference?

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