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In an xy-coordinate system, which points do not lie in
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02 Nov 2020, 10:52
02 Nov 2020, 10:52
Expert Reply
5
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Question Stats:
43% (01:04) correct
56% (01:03) wrong based on 32 sessions
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In an ??-coordinate system, which points do not lie in the interior of a circle with center (0,0) and radius 5?
Indicate all such points.
A. (1, −5)
B. (0,5)
C. (2, −2)
D. (3,3)
E. (−3,4)
F. (5,5)
Source: 320 GRE Math Questions
Indicate all such points.
A. (1, −5)
B. (0,5)
C. (2, −2)
D. (3,3)
E. (−3,4)
F. (5,5)
Source: 320 GRE Math Questions
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Official Answer
A,B,E,F
Re: In an xy-coordinate system, which points do not lie in
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03 Nov 2020, 06:00
03 Nov 2020, 06:00
1
How come option E: (-3,4), is also right when the circle extends till (-5,5), because the radius is 5?
(-3,4) should be in circle's interior.
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(-3,4) should be in circle's interior.
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Re: In an xy-coordinate system, which points do not lie in
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30 Jan 2021, 19:52
30 Jan 2021, 19:52
1
Radius of circle = 5
if a point is (-3,4)
The distance of point from origin is sqrt(3^2 + 4^2) = 5, so it lies on the circle.
Use the concept of Pythagoras theorem for other points.
if a point is (-3,4)
The distance of point from origin is sqrt(3^2 + 4^2) = 5, so it lies on the circle.
Use the concept of Pythagoras theorem for other points.
