Best Answer

The formula for the circumference (C) of a circle is C = 2πr where r is the radius.

But, the diameter (D) of a circle is twice the radius so this formula can be written C = πD.

C = π x 13 = 40.841 cm (3dp)

Q: What is the circumference if 13cm is the diameter?

Write your answer...

Submit

Still have questions?

Continue Learning about Other Math

26

using the formula circumference=diameter X pi: circumference=diameter X pi circumference/pi=diamter X pi/pi circumference/pi=diameter therefore, diameter=circumference/pi diameter=12mm/3.14 diameter=3.821mm

If a circle has a circumference of 8 the diameter is: about 2.546 (circumference divided by pi = diameter).

The circumference of 1.5 diameter is: 4.712

Circumference = Pi * diameter

Related questions

26

Diameter = Circumfrence/pi = 13/pi = 4.14 cm (approx)

The circumference of a circle if its radius is 13cm is: 81.68 cm

Circumference of the circle: 13*pi = 40.841 cm rounded up to 3 decimal places

Something that goes around

Radius = about 13cm Diameter = about 26cm

Circumference is Pi x Diameter so do Circumference divided by Pi to get the diameter :)

It is: 2*pi*13 = 81.681 cm

Circumference is pi times diameter. Diameter is circumference divided by pi. Diameter is twice the radius. Radius is half the diameter.

Diameter = Circumference/pi

diameter = circumference/pi

using the formula circumference=diameter X pi: circumference=diameter X pi circumference/pi=diamter X pi/pi circumference/pi=diameter therefore, diameter=circumference/pi diameter=12mm/3.14 diameter=3.821mm