Question 141473
The radius of the original piece of paper is the slant height of the cone.  The slant height of the cone can be calculated by the Pythagorean Theorem because the slant height is the hypotenuse of a right triangle where the radius of the cone base and the height of the cone are the legs.  Once you have calculated the radius of the original piece of paper, you can multiply by {{{2pi}}} to get the circumference.  I would leave my answer in terms of {{{pi}}} unless your instructor has given you different instructions.