Multiple choice general knowledge math & puzzles PERIMETER OF A CIRCLE 2x(22/7)xR (22/7)xR^2 (22/7)^2xR R^2 Reveal answer Fill a bubble to check yourself A Correct answer Explanation The perimeter (circumference) of a circle is 2 * pi * R. Using 22/7 as an approximation for pi, the formula becomes 2 * (22/7) * R. Option 407798 correctly identifies this geometric formula.