Q: What is the exact circumference of a circle with a diameter of 21 inches?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

the exact circumference is 11pi inches

Circumference of the circle: 7.4*pi cm

-- Exact circumference = 2pi meters -- Approximate circumference = 6.283 meters

Exact area of the circle: 9*pi inches

Exact area of the circle: 9*pi inches

Related questions

the exact circumference is 11pi inches

31x3.1416=circumference

To be exact, it is 11/π. For a rough numerical representation of it, it is about 3.50140875.

Circumference of the circle: 7.4*pi cm

The circumference is 62.8318531 inches.

150.8

Approx. circumference = multiply diameter by 22 and divide the product by 7. Exact circumference = Pi x diameter.

-- Exact circumference = 2pi meters -- Approximate circumference = 6.283 meters

Exact area of the circle: 9*pi inches

The circumference of any circle when divided by its diameter has the exact value of pi

(circumference=2πr or πd) so the circumference in exact form would be π726.4

circumference formula is pi(diameter) diameter is 2(radius) radis=4; diameter=2(4)=8 pi(8)=circumference of the circle...this is the EXACT answer plug it into a calculator and you will get 25.1327412287 your welcome ;)