In the xy-plane, the point (-2, -3) is the center of a circle. The point (-2, 1) lies inside the circle and the point (4, -3) lies outside the circle. If the radius r of the circle is an integer, then r =
[A] 6
5
[C] 4
[D] 3
[E] 2
Please temme how to approach...
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Circles...Radius problem...??
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vk_vinayak
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nroy347 wrote:In the xy-plane, the point (-2, -3) is the center of a circle. The point (-2, 1) lies inside the circle and the point (4, -3) lies outside the circle. If the radius r of the circle is an integer, then r =
[A] 6
5
[C] 4
[D] 3
[E] 2
Please temme how to approach...
Draw a X Y co-ordinate. And see the difference between center and each point.
The point (-2, 1) lies inside the circle => radius is greater than 4
the point (4, -3) lies outside the circle => radius is less than 6.
Ans is B.
- VK
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cypherskull
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Calculate the distance b/w (-2,-3) and (-2,1); d = 4.
Since (-2,1) is inside the circle, r > 4. Eliminate C,D,E.
Calculate the distance b/w (-2,-3) and (4,-3); d = 6.
Since (4,-3) is outside the circle, r < 6. Eliminate A. [spoiler]Ans:B[/spoiler]
Since (-2,1) is inside the circle, r > 4. Eliminate C,D,E.
Calculate the distance b/w (-2,-3) and (4,-3); d = 6.
Since (4,-3) is outside the circle, r < 6. Eliminate A. [spoiler]Ans:B[/spoiler]
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Sunit
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Kill all my demons..And my angels might die too!
Sunit
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Kill all my demons..And my angels might die too!
