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GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2508
Given Kudos: 1053
GPA: 3.39
On the xy-plane, a circle has center (2,-1), and the point
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29 Mar 2020, 08:42
29 Mar 2020, 08:42
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On the xy-plane, a circle has center (2,-1), and the point (-3,3) lies along the circle’s circumference. What is the square-unit area of the circle?
(A) \(36π\)
(B) \(\frac{81π}{2}\)
(C) \(41π\)
(D) \(48π\)
(E) \(57π\)
(A) \(36π\)
(B) \(\frac{81π}{2}\)
(C) \(41π\)
(D) \(48π\)
(E) \(57π\)
Re: On the xy-plane, a circle has center (2,-1), and the point
[#permalink]
29 Mar 2020, 22:11
29 Mar 2020, 22:11
1
Calculate the distance between the two points. d= sqrt(x2-x1)^2 + (y2-y1)^2.
This gives us d= sqrt 41.This is the radius of circle.
Area of a circle = pi*r^2
Which gives us 41*pi
Thus, C is the answer.
This gives us d= sqrt 41.This is the radius of circle.
Area of a circle = pi*r^2
Which gives us 41*pi
Thus, C is the answer.
gmatclubot
Re: On the xy-plane, a circle has center (2,-1), and the point [#permalink]
29 Mar 2020, 22:11
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