What is the circumference of a circle with radius 10 meters?

Start playing free

  1. 10π meters
  2. 20π meters
  3. 100π meters

🔒 The answer is for SESK members. Members see the answer, why it's right and the official sources for every card of Stuff Every Military Recruit Should Know, plus timed practice exams.

The first 50 cards of every test are free to play.

Play the free cards See membership

Like this card?
Play the game

References

  1. OpenStax Prealgebra 2e, Solve Geometry Applications: Circles and Irregular Figures openstax.org/books/prealgebra-2e/pages/9-5-solve-geometry-applications-circles-and-irregular-figures Checked 2026-10-12.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game