Asked by Anonymous

If a circle's circumference is 15 inches, what is its radius?
Answered by Ms. Sue
C = pi * d

15 = 3.14 * d

15/3.14 = d

4.77707 = d

4.77707 / 2 = r

2.388535 = r

Answered by Anonymous
I still don't understand this.
Answered by Anonymous
Can you explain the steps in solving this formula?
Answered by Ms. Sue
Please copy and paste the line you don't understand.

Answered by Anonymous
C = pi * d

15 = 3.14 * d

15/3.14 = d

4.77707 = d

4.77707 / 2 = r

I apologize, but I do not understand any of them.
Answered by Ms. Sue
Circumference = pi * diameter

Then I substituted real numbers for the letters.

Answered by Anonymous
How did you know which numbers to use?
Answered by Ms. Sue
Please memorize pi = 3.154

Your problem stated that the circumference is 15.

Answered by heylor
thats wrong. pi equals to 3.14 not 3.154 and im in 7th grade and i know this hahah
There are no AI answers yet. The ability to request AI answers is coming soon!