# Math Is Fun Forum

Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

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## #201 2020-09-18 21:06:14

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Hi,

Excellent!

CG#124. Prove that the points A(0,-1), B(-2,3), C(6,7), and D(8,3) are the vertices of a rectangle ABCD.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #202 2020-09-25 13:29:29

666 bro
Member
From: Flatland
Registered: 2019-04-26
Posts: 630

### Re: Coordinate Geometry

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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## #203 2020-09-25 15:28:11

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Hi,

Good work!

CG#125. Show that the points A(1,3), B(2,6), C(5,7), and D(4,4) are the vertices of a rhombus.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #204 2020-10-02 18:13:10

666 bro
Member
From: Flatland
Registered: 2019-04-26
Posts: 630

### Re: Coordinate Geometry

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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## #205 2020-10-02 18:28:04

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Hi,

Neat work!

CG # 126.  Find the slope of the line perpendicular to the line joining the points (6, 10)and (-8, 4).

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #206 2020-10-09 22:22:15

666 bro
Member
From: Flatland
Registered: 2019-04-26
Posts: 630

### Re: Coordinate Geometry

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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## #207 2020-10-09 22:46:17

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Good work!

CG # 127. If x(-4, 2), y(4, 6), and z(-4, -8) are three points, then find the angle between yx and yz.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #208 2020-10-16 14:00:19

666 bro
Member
From: Flatland
Registered: 2019-04-26
Posts: 630

### Re: Coordinate Geometry

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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## #209 2020-10-16 15:17:33

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Keep trying.

CG # 128. If the coordinates of the midpoints of the sides of a triangle are (2, 2), (4, -6), and (6, 8), find its centroid.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #210 2020-10-24 01:36:36

666 bro
Member
From: Flatland
Registered: 2019-04-26
Posts: 630

### Re: Coordinate Geometry

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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## #211 2020-10-24 13:51:11

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Hi,

Neat work!

CG#129. Find the co-ordinates of the incentre of the triangle whose vertices are A(8,-4), B(10,10), and C(-4,8).

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #212 2020-10-30 16:30:50

666 bro
Member
From: Flatland
Registered: 2019-04-26
Posts: 630

### Re: Coordinate Geometry

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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## #213 2020-10-30 20:30:08

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Hi,

Neat work!

CG # 130. Find the area of the quadrilateral ABCD whose vertices are (-8,4), (2,-2), (8,2), and (4,10).

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #214 2020-11-13 18:02:58

666 bro
Member
From: Flatland
Registered: 2019-04-26
Posts: 630

### Re: Coordinate Geometry

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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## #215 2020-11-13 18:33:06

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Hi,

Neat work!

CG#131. Find the ratio in which x + y = 5 divides AB, where A(6, -2) and B (4, 5) are two given points.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #216 2020-11-28 14:13:42

666 bro
Member
From: Flatland
Registered: 2019-04-26
Posts: 630

### Re: Coordinate Geometry

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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## #217 2020-11-28 23:39:02

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Good work!

CG#132. Find the area of a triangle whose vertices are (5, 4), (3, 6), and (2, -5).

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #218 2020-12-01 11:54:09

Denominator
Member
Registered: 2009-11-23
Posts: 215

Hi,

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## #219 2020-12-01 18:36:36

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Hi,

Neat work!

CG # 133. Find the equation of the line passing through the points (-3, 2) and (4, 3).

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #220 2021-01-06 20:39:55

666 bro
Member
From: Flatland
Registered: 2019-04-26
Posts: 630

### Re: Coordinate Geometry

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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## #221 2021-01-06 23:39:21

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Keep trying!

CG # 134. Find the equation of the line passing through the point (-2,8) and having a slope 2/3.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #222 2021-01-07 01:03:40

666 bro
Member
From: Flatland
Registered: 2019-04-26
Posts: 630

### Re: Coordinate Geometry

"An equation for me has no meaning, unless it expresses a thought of God"- Srinivasa ramanujan

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## #223 2021-01-07 04:34:54

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Coordinate Geometry

Last edited by irspow (2021-01-07 07:34:16)

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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## #224 2021-01-07 14:40:51

ganesh
Registered: 2005-06-28
Posts: 33,022

### Re: Coordinate Geometry

Hi,

Neat work, 666 bro and irspow!

CG # 135. Find the equation of the line passing through the point (-2,-3) and perpendicular to the line joining the points (1,5) and (3,7).

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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## #225 2021-01-20 05:52:50

irspow
Member
Registered: 2005-11-24
Posts: 1,055

### Re: Coordinate Geometry

I am at an age where I have forgotten more than I remember, but I still pretend to know it all.

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