The area of a circle is 81π ft². What is the circumference, of feet? Express your answer in terms of π

Sophie Swett asked Aug 14, 2023

374,963 views

8 votes

Sophie Swett asked Aug 14, 2023

2.5k points

Your comment on this question:

Email me at this address if a comment is added after mine:Email me if a comment is added after mine

Privacy: Your email address will only be used for sending these notifications.

Email me at this address if my answer is selected or commented on:Email me if my answer is selected or commented on

Privacy: Your email address will only be used for sending these notifications.

26 votes

Answer:

18π

Explanation:

81π = πr²

√81 = √r²

9 = r

C = 2πr

C = (2)(π)(9)

C = 18π

Umashankar answered Aug 21, 2023

2.6k points

Email me at this address if a comment is added after mine:Email me if a comment is added after mine

Privacy: Your email address will only be used for sending these notifications.

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

1.6m questions

2.0m answers