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A circle with center (1, 0) and radius 2 lies in the coordinate plane

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Joined: 02 Sep 2009
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A circle with center (1, 0) and radius 2 lies in the coordinate plane  [#permalink]

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New post 13 Sep 2018, 02:29
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A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

52% (02:05) correct 48% (01:43) wrong based on 67 sessions

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Joined: 01 Feb 2017
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A circle with center (1, 0) and radius 2 lies in the coordinate plane  [#permalink]

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New post 13 Sep 2018, 02:39
Ans D

(a,b)= (3,0)

(x,y) lies on the circle.

Q: Is y=b=0?

St.1: x=-1.
Coordinates of only point on circle with x=-1 is (-1,0)
So, y=b=0. Sufficient.

St.2: y=0. We are given that b=0. Hence, y=b=0. Sufficient.
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A circle with center (1, 0) and radius 2 lies in the coordinate plane  [#permalink]

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New post 06 Oct 2019, 00:07
Can we get (a,b) =(3,0) directly from the picture above?
I know the circle intercept with X axis in point (-1,0) and (3.0).
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A circle with center (1, 0) and radius 2 lies in the coordinate plane   [#permalink] 06 Oct 2019, 00:07
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A circle with center (1, 0) and radius 2 lies in the coordinate plane

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