Question
If a circle's circumference is 15 inches, what is its radius?
Answers
Ms. Sue
C = pi * d
15 = 3.14 * d
15/3.14 = d
4.77707 = d
4.77707 / 2 = r
2.388535 = r
15 = 3.14 * d
15/3.14 = d
4.77707 = d
4.77707 / 2 = r
2.388535 = r
Anonymous
I still don't understand this.
Anonymous
Can you explain the steps in solving this formula?
Ms. Sue
Please copy and paste the line you don't understand.
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.
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.
Ms. Sue
Circumference = pi * diameter
Then I substituted real numbers for the letters.
Then I substituted real numbers for the letters.
Anonymous
How did you know which numbers to use?
Ms. Sue
Please memorize pi = 3.154
Your problem stated that the circumference is 15.
Your problem stated that the circumference is 15.
heylor
thats wrong. pi equals to 3.14 not 3.154 and im in 7th grade and i know this hahah