The circumference of a circular patio with a radius of 3 feet, 3 inches is______.

Question

imstuck · Answer

Do you know the formula for the circumference of a circle?

igster1112 · Answer

It says in the book C= pied or C=2pieR. I'm just confused because it says feet and inches.

thesmartone · Answer

$\sf Circumference = 2\pi r$

where r is the radius

and the r can be any length of unit, and that will also be the unit of the circumference

igster1112 · Answer

So it can be either the 3 feet or 3 inches?

thesmartone · Answer

I think the question is saying that the radius is 3 feet and 3 inches

to calculate the circumference, convert it all to inches

or you can make it feet, and 3 inches is 1/4th of a foot because 12 inches makes it a feet

igster1112 · Answer

39 inches in total so I would do pie times 78 because that's the diameter

igster1112 · Answer

Wait no

thesmartone · Answer

that works too :)

and your circumference will be in inches :)

igster1112 · Answer

I tried that it didn't work.

igster1112 · Answer

A) 20 feet, 5 inches
B) 20 feet, 9 square inches
C) 20.5 square feet
F) 20 feet, 9 inches

igster1112 · Answer

A) 20 feet, 5 inches
B) 20 feet, 9 square inches
C) 20.5 square feet
F) 20 feet, 9 inches

igster1112 · Answer

I got 244.92

thesmartone · Answer

That's in inches

to bring that in to feet, divide by 12

igster1112 · Answer

I got 20.41

igster1112 · Answer

So the answer would be A?

thesmartone · Answer

correct :)

igster1112 · Answer

Ok thank you

thesmartone · Answer

Anytime! :)