GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
If O is the center of the circle, what is the perimeter of t
[#permalink]
19 Sep 2018, 17:49
19 Sep 2018, 17:49
3
Expert Reply
2
Bookmarks
00:00
Question Stats:
80% (00:57) correct
19% (01:12) wrong based on 97 sessions
Hide Show timer Statistics
Attachment:
Capture.JPG [ 19.18 KiB | Viewed 6743 times ]
If O is the center of the circle, what is the perimeter of the sector with central angle 72°?
(A) \(5 + 2\pi\)
(B) \(10 + 2\pi\)
(C) \(10 + 4\pi\)
(D) \(10 + 5\pi\)
(E) \(20 + 2\pi\)
Re: If O is the center of the circle, what is the perimeter of t
[#permalink]
20 Feb 2020, 14:04
20 Feb 2020, 14:04
Expert Reply
Bump for further discussion
Re: If O is the center of the circle, what is the perimeter of t
[#permalink]
14 Feb 2021, 03:01
14 Feb 2021, 03:01
As the radius is 5, so both straight lines will be 5 + 5 = 10.
And the arc length = 2 * pi * r * (72 / 360) = 2 * pi * 5 * 1/5 = 2 * pi
So, perimeter is = 10 + 2 * pi
And the arc length = 2 * pi * r * (72 / 360) = 2 * pi * 5 * 1/5 = 2 * pi
So, perimeter is = 10 + 2 * pi
