SOLUTION: I am making a round fairy princess skirt for my granddaughter. I have a solid circle cut out (ie, no seams). I need to put a hole in the center for her waist to fit into. The measu

Question 42092: I am making a round fairy princess skirt for my granddaughter. I have a solid circle cut out (ie, no seams). I need to put a hole in the center for her waist to fit into. The measurement of her waist is 20". I can't remember how to find the radius of a circle so I can fold the fabric and cut out a hole that would have the circumference of 20".
Thank you in advance for your help. If you show me the equation I would really appreciate it. I used to love math but haven't used it like this for 40 years.
Best regards,
Tina
Answer by psbhowmick(878) (Show Source): You can put this solution on YOUR website!
If radius of a circle is 'r' then the circumference = .
Measurement of waist is 20" means the circumference is 20".
Thus,
or
or r = 3.183"

So the reqd. radius is 3.183 inches.
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