Saturday

December 20, 2014

December 20, 2014

Posted by **Jen** on Friday, July 29, 2011 at 11:19pm.

Is it 110.25p inches??

- Math -
**Bosnian**, Saturday, July 30, 2011 at 1:57amIn google type:

circumference of a circle

When you see list of results go on wikipedia.

C = circumference

d = diameter

C = d*pi

C = 21*3.14159

C = 65.97339 in

- Math -
**Reiny**, Saturday, July 30, 2011 at 7:38amCircumference = 2πr or dπ with d as diameter

so circumference = 21π

(it asked for "exact" circumference , so the answer has to be left in terms of π )

**Answer this Question**

**Related Questions**

math - If the number of square inches in the area of a circle is equal to the ...

math - If the number of square inches in the area of a circle is equal to the ...

math - If the number of square inches in the area of a circle is equal to the ...

math - what is the exact circumference of a circle with a diameter of 13 inches?

geometry - What is the exact circumference of a circle with a diameter of 15 ...

Math - The diameter of a circle is 7 inches. What is the circumference of the ...

Math - The formula to find the circumference of a circle that has a diameter of ...

math - Using the formula C = 2ğr, find the circumference of a circle with ...

5th grade - Can you please help with the following questons: 1. Duran was ...

math - what is the exact area of a circle with a diameter of 15 inches?