Amber S.

asked • 10/01/16

If the circumference of a circle is 26p millimeters, what is the radius of the circle?

How to solve? 

David S.

tutor
Is the p in 26p supposed to stand for the symbol π ("pi")?  If so you'll have to show that there will be cancelling of this symbol in your final answer.
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10/01/16

Michael J.

Most students who post these questions write pi using either the notation "p" or "pi", since they don't know how to use the special symbols to write pi correctly.  In addition, "p" would not be a symbol to represent a unit of measure, since the student specifically stated millimeters.
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10/02/16

2 Answers By Expert Tutors

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Kathryn H. answered • 10/01/16

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4.9 (16)

Patient and organized SAT and Praxis tutor

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C= pi times diameter therefore, 26=pi times diameter. 
26= 3.14 x d
 
Divide C by 3.14 to find the diameter. 
 
When you find the diameter, you can find the radius. 
 
Diameter is twice radius. So, you would divide the diameter by 2 to find the radius.
 
I hope that helps.
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