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#1 2006-02-27 16:44:14
- Jai Ganesh
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Coordinate Geometry
CG # 1
Find the area of the triangle whose vertices are
(2, -3), (-1, 3) and (4, 7).
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2 2006-02-27 18:32:13
- krassi_holmz
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- Registered: 2005-12-02
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Re: Coordinate Geometry
21
IPBLE: Increasing Performance By Lowering Expectations.
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#3 2006-02-27 19:45:29
- Jai Ganesh
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Re: Coordinate Geometry
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#4 2006-02-27 20:17:05
- krassi_holmz
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Re: Coordinate Geometry
That was easy. I solved it in Paint for~1min
IPBLE: Increasing Performance By Lowering Expectations.
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#5 2006-02-28 16:17:19
- Jai Ganesh
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Re: Coordinate Geometry
CG # 2
Find (x,y) if (3,2), (6,3), (x,y) and (6,5) are the vertices of a parellologram taken in order.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#6 2006-02-28 17:59:51
- krassi_holmz
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Re: Coordinate Geometry
{3,4}?
IPBLE: Increasing Performance By Lowering Expectations.
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#7 2006-02-28 19:41:06
- Jai Ganesh
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Re: Coordinate Geometry
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#8 2006-03-01 03:37:59
- mathsyperson
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- Registered: 2005-06-22
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Re: Coordinate Geometry
(9,6)?
Why did the vector cross the road?
It wanted to be normal.
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#9 2006-03-01 03:46:38
- Jai Ganesh
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Re: Coordinate Geometry
Correct, mathsyperson! 
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#10 2006-03-01 04:00:29
- Jai Ganesh
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- Posts: 50,901
Re: Coordinate Geometry
CG # 3
If 3x-2y+4=0 and ax+4y+3=0 are parallel lines, find the value of a.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#11 2006-03-01 06:17:02
- Patrick
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- Registered: 2006-02-24
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Re: Coordinate Geometry
CG# 3
a = -6?
Last edited by Patrick (2006-03-01 06:17:20)
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#12 2006-03-01 15:59:53
- Jai Ganesh
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Re: Coordinate Geometry
You're correct, Patrick! Well done! 
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#13 2006-03-01 16:13:04
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 50,901
Re: Coordinate Geometry
CG # 4
Find the equations of the lines which pass through the point (3,4) and make intercepts on the axes such that their sum is 14.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#14 2006-03-01 18:08:18
- ryos
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- Registered: 2005-08-04
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Re: Coordinate Geometry
El que pega primero pega dos veces.
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#15 2006-03-01 18:25:24
- Jai Ganesh
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Re: Coordinate Geometry
They are the only equations for which the conditions work
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#16 2006-03-02 17:39:04
- Jai Ganesh
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Re: Coordinate Geometry
CG # 5
Find the equation of the perpendicular bisector of the line joining the points A(-1,2) and B(3,-4).
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#17 2006-03-06 16:22:15
- Dionysus
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- Registered: 2006-03-06
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Re: Coordinate Geometry
Last edited by Dionysus (2006-03-06 16:22:49)
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#18 2006-03-06 16:50:37
- Jai Ganesh
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Re: Coordinate Geometry
Excellent, Dionysus! 
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#19 2006-03-06 18:31:40
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 50,901
Re: Coordinate Geometry
CG # 6
Prove that the lines 3x-4y+5=0, 7x-8y+5=0 and 4x+5y=45 are concurrent.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#20 2006-03-08 20:02:03
- Jai Ganesh
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Re: Coordinate Geometry
CG # 7
Show that the points (4, -4), (-4, 4), and (4√3, 4√3) are the vertices of an equilateral triangle.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#21 2006-03-09 16:50:39
- Dionysus
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- Registered: 2006-03-06
- Posts: 9
Re: Coordinate Geometry
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#22 2006-03-10 03:00:46
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,901
Re: Coordinate Geometry
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#23 2006-03-10 04:27:36
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 50,901
Re: Coordinate Geometry
CG # 8
Find the equation of the straight line making an angle 135° with the positive direction of x-axis and cutting an intercept 5 on the y-axis.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#24 2006-03-10 04:31:37
- mathsyperson
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Re: Coordinate Geometry
tan 135° = -1, so that is the gradient of the line. We are told that the y-intercept is 5, so the equation is y = 5-x.
Why did the vector cross the road?
It wanted to be normal.
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#25 2006-03-10 15:50:29
- Jai Ganesh
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- Registered: 2005-06-28
- Posts: 50,901
Re: Coordinate Geometry
Very good, mathsyperson!
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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