Hi there! To find the circumference of a circle, you do pi (3.14) times the diameter. To find the area of a circle, you do p (3.14) times radius squared. That means you multiply the radius (half the circle) by itself. If you fo the formulas right, here are the right answers for this situation.
Circumference: 24.806 cm
Area: 48.99185 square centimeters
