In the xy plane, point p has coordinates (a,b) and point Q : GMAT Data Sufficiency (DS)
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# In the xy plane, point p has coordinates (a,b) and point Q

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In the xy plane, point p has coordinates (a,b) and point Q [#permalink]

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29 Jul 2010, 22:33
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In the xy plane, point P has coordinates (a,b) and point Q has coordinate(c,d). What is the distance between point Q and point P ?

(1) b - d = 4
(2) a - c = 3

I dont understand this type of question, I mean the xy plane ! so if there a formula to follow in case then someone help me out

thanks
[Reveal] Spoiler: OA

Last edited by Bunuel on 12 Nov 2013, 02:35, edited 1 time in total.
Edited the question.
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29 Jul 2010, 22:47
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xmagedo wrote:
In the xy plane, point p has coordinates (a,b) and point Q has coordinate(c,d). What is the distance between point Q ?

1 b-d=4
2 a-c=3

I dont understand this type of question, I mean the xy plane ! so if there a formula to follow in case then someone help me out

thanks

Distance between point $$A(x_1,y_1)$$ and $$B(x_2,y_2)$$ can be found by the formula $$D=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$$.

So the distance between point $$P(a,b)$$ and point $$Q(c,d)$$ would be $$D=\sqrt{(a-c)^2+(b-d)^2}$$.

(1) b-d=4 --> don't know a-c. Not sufficient.
(2) a-c=3 --> don't know b-d. Not sufficient.

(1)+(2) We have all necessary info. Sufficient: $$D=\sqrt{(a-c)^2+(b-d)^2}=\sqrt{3^2+4^2}=5$$.

Answer: C.

For more on this topic check Coordinate Geometry chapter of Math Book (link in my signature).

Hope it helps.
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Re: In the xy plane, point p has coordinates (a,b) and point Q [#permalink]

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12 Nov 2013, 02:07
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xmagedo wrote:
In the xy plane, point p has coordinates (a,b) and point Q has coordinate(c,d). What is the distance between point Q ?

(1) b-d=4
(2) a-c=3

I dont understand this type of question, I mean the xy plane ! so if there a formula to follow in case then someone help me out

thanks

Please correct the question, " What is the distance between point Q and point P ?
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Kudos [?]: 96210 [0], given: 10716

Re: In the xy plane, point p has coordinates (a,b) and point Q [#permalink]

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12 Nov 2013, 02:36
Skag55 wrote:
xmagedo wrote:
In the xy plane, point p has coordinates (a,b) and point Q has coordinate(c,d). What is the distance between point Q ?

(1) b-d=4
(2) a-c=3

I dont understand this type of question, I mean the xy plane ! so if there a formula to follow in case then someone help me out

thanks

Please correct the question, " What is the distance between point Q and point P ?

_____________
Done. Thank you.
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Re: In the xy plane, point p has coordinates (a,b) and point Q [#permalink]

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10 Aug 2016, 23:25
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Re: In the xy plane, point p has coordinates (a,b) and point Q   [#permalink] 10 Aug 2016, 23:25
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# In the xy plane, point p has coordinates (a,b) and point Q

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