Circumference of a circle from the radius
Circumference = π × diametre, with π = 3.14. Double the radius to get the diametre.
Loading a question…
You've done today's 10 free questions.
Come back tomorrow for 10 more, or get unlimited practice with a membership.
Want more today? Print 20 more questions free, with the answers.
Already a member? Sign in.
See worked examples
A circle has a radius of 55 cm. Find its circumference. Use π = 3.14.
Answer: 345.4
A circle has a radius of 60 cm. Find its circumference. Use π = 3.14.
Answer: 376.8
A circle has a radius of 43 cm. Find its circumference. Use π = 3.14.
Answer: 270.04
Tip: Circumference = π × diametre, with π = 3.14. Double the radius to get the diametre.
Print a worksheet of this skill New questions and an answer key, free.
Up next
- Next in this topic Circumference of a circle from the diametre Grade 7
Print a free worksheet with answers (20 questions).
Practise without limits
Members practise as much as they like, every day, and get the printable packs and lessons too.