Formulas - Circles & Cylinders

• Surface Area/ One open Lid

  πr2 + 2πrh
• Surface Area


  2πr2 + 2πrh
• Circumference


  D x π OR 2πr
• Surface Area/ Two lids open

  πr2 + πrh
• Reverse Surface Area - Height


  SA/2πr - r
• Diameter


  C/π OR r x 2
• Radius


  (c/π) OR D/2
• Reverse Volume - Height: 

  V/(πr2)
• Surface Area: 

  2πr2 + 2πrh 
• Reverse Area - Diameter: 

  √(A/π)2
• Area: 

  πr2 
• Volume: 

  πr2h 
• Reverse Area - Radius: 

  √(A/π)