December 13, 2018 December 13, 2018 08:00 AM PST 09:00 AM PST What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL. December 14, 2018 December 14, 2018 09:00 AM PST 10:00 AM PST 10 Questions will be posted on the forum and we will post a reply in this Topic with a link to each question. There are prizes for the winners.
Author 
Message 
TAGS:

Hide Tags

Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 6629
GPA: 3.82

In the coordinate plane, a triangle ABC has 3 points A(1,0), B(1,0),
[#permalink]
Show Tags
18 Oct 2017, 23:05
Question Stats:
63% (00:53) correct 37% (01:19) wrong based on 70 sessions
HideShow timer Statistics
[GMAT math practice question] In the coordinate plane, a triangle ABC has 3 points A(1,0), B(1,0), and C(m,n). What is the area of the triangle ABC? 1) m=2 2) n=2
Official Answer and Stats are available only to registered users. Register/ Login.
_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The oneandonly World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only $99 for 3 month Online Course" "Free Resources30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons  try it yourself"



Math Expert
Joined: 02 Sep 2009
Posts: 51185

Re: In the coordinate plane, a triangle ABC has 3 points A(1,0), B(1,0),
[#permalink]
Show Tags
19 Oct 2017, 01:13



Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 6629
GPA: 3.82

Re: In the coordinate plane, a triangle ABC has 3 points A(1,0), B(1,0),
[#permalink]
Show Tags
22 Oct 2017, 20:15
=> Forget conventional ways of solving math questions. In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem. Remember that equal number of variables and independent equations ensures a solution. The first step of VA(Variable Approach) method is modifying the original condition and the question, and rechecking the number of variables and the number of equations. We can consider AB as the base and the ycoordinate n of the point C as another point of the triangle, and n is its height. Thus, its area is (1/2)*2*n = n. Hence, only condition 2) is sufficient. Therefore, B is the answer. Answer: B
_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The oneandonly World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only $99 for 3 month Online Course" "Free Resources30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons  try it yourself"



Manager
Joined: 15 Aug 2016
Posts: 148
Location: India
Concentration: Technology, Operations
WE: Operations (Consulting)

In the coordinate plane, a triangle ABC has 3 points A(1,0), B(1,0),
[#permalink]
Show Tags
23 Oct 2017, 06:49
MathRevolution wrote: => Forget conventional ways of solving math questions. In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem. Remember that equal number of variables and independent equations ensures a solution. The first step of VA(Variable Approach) method is modifying the original condition and the question, and rechecking the number of variables and the number of equations. We can consider AB as the base and the ycoordinate n of the point C as another point of the triangle, and n is its height. Thus, its area is (1/2)*2*n = n.
Hence, only condition 2) is sufficient.
Therefore, B is the answer.
Answer: B Hi, Can you explain why are you taking the triangle as right angled triangle? It could be acute or obtuse also for example coordinates 3,2 will give obtuse triangle and in the question it is not mentioned that it is a right angled triangle. Thats why I had marked C. Didnt understand why we should take it as right angled triangle.



Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 6629
GPA: 3.82

Re: In the coordinate plane, a triangle ABC has 3 points A(1,0), B(1,0),
[#permalink]
Show Tags
01 Nov 2017, 21:29
Utkarsh KOhli wrote: MathRevolution wrote: => Forget conventional ways of solving math questions. In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem. Remember that equal number of variables and independent equations ensures a solution. The first step of VA(Variable Approach) method is modifying the original condition and the question, and rechecking the number of variables and the number of equations. We can consider AB as the base and the ycoordinate n of the point C as another point of the triangle, and n is its height. Thus, its area is (1/2)*2*n = n.
Hence, only condition 2) is sufficient.
Therefore, B is the answer.
Answer: B Hi, Can you explain why are you taking the triangle as right angled triangle? It could be acute or obtuse also for example coordinates 3,2 will give obtuse triangle and in the question it is not mentioned that it is a right angled triangle. Thats why I had marked C. Didnt understand why we should take it as right angled triangle. Since A(1,0), B(1,0) and AB is parallel to the xaxies, when we know ycoordinate of the point C, we identify the height of the triangle with the base AB. We don't need to consider a right triangle in this case.
_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare The oneandonly World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. "Only $99 for 3 month Online Course" "Free Resources30 day online access & Diagnostic Test" "Unlimited Access to over 120 free video lessons  try it yourself"



Manager
Joined: 08 Apr 2017
Posts: 79

Re: In the coordinate plane, a triangle ABC has 3 points A(1,0), B(1,0),
[#permalink]
Show Tags
01 Nov 2017, 22:35
We know AB. So let AB be the base of the triangle. Now we need to find the height of the triangle... Y = K is a line parallel to xaxis. The distance between this line and the x axis will always be the same as its parallel. Hence irrespective of the x axis or the point, the height of the triangle formed with any point in this line will be have the same area. Option B gives us the solution Y = 3
Sent from my iPhone using GMAT Club Forum




Re: In the coordinate plane, a triangle ABC has 3 points A(1,0), B(1,0), &nbs
[#permalink]
01 Nov 2017, 22:35






