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#1 2017-04-24 20:26:43

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Distance

Hi
Distance of point (2,3) form y axis ???
I don't know y axis I found between two points so how find on x axis or y axis???


MZk

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#2 2017-04-24 20:38:50

bob bundy
Administrator
Registered: 2010-06-20
Posts: 8,139

Re: Distance

MK4HTTU.gif

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#3 2017-04-24 21:11:46

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Re: Distance

3???


MZk

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#4 2017-04-24 21:44:47

iamaditya
Member
From: Planet Mars
Registered: 2016-11-15
Posts: 725

Re: Distance

Hi,

When we represent a point on a graph we always write it as (x,y) where x is the distance fro the horizantal x-axis and y is the distance from the vertical y-axis. Here, the point (2,3) is 2 units away from x-axis and 3 units away from y-axis. Hence the distance of the pt. from y axis is 3.


Practice makes a man perfect.
There is no substitute to hard work
All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

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#5 2017-04-24 21:48:59

zetafunc
Moderator
Registered: 2014-05-21
Posts: 2,108
Website

Re: Distance

iamaditya wrote:

Hi,

When we represent a point on a graph we always write it as (x,y) where x is the distance fro the horizantal x-axis and y is the distance from the vertical y-axis. Here, the point (2,3) is 2 units away from x-axis and 3 units away from y-axis. Hence the distance of the pt. from y axis is 3.

You have that the wrong way round -- x represents the distance from the y-axis, and y represents the distance from the x-axis (so (2,3) is 2 units away from the y-axis, not the x-axis).

Last edited by zetafunc (2017-04-24 21:49:55)

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#6 2017-04-24 21:51:14

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Distance

Hi;

This is a bit tricky to get but I would say the distance from the y axis is 2. I suggest to not abandon a visual approach here. Please check bob bundy's drawing.


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#7 2017-04-24 22:00:17

iamaditya
Member
From: Planet Mars
Registered: 2016-11-15
Posts: 725

Re: Distance

zetafunc wrote:
iamaditya wrote:

Hi,

When we represent a point on a graph we always write it as (x,y) where x is the distance fro the horizantal x-axis and y is the distance from the vertical y-axis. Here, the point (2,3) is 2 units away from x-axis and 3 units away from y-axis. Hence the distance of the pt. from y axis is 3.

You have that the wrong way round -- x represents the distance from the y-axis, and y represents the distance from the x-axis (so (2,3) is 2 units away from the y-axis, not the x-axis).


Hmm, Thnx for correcting me. I often get confused between the 2.


Practice makes a man perfect.
There is no substitute to hard work
All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

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#8 2017-04-24 22:07:24

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Distance

Hi;

Do not forget to visualize problems by drawing diagrams and plots.


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#9 2017-04-24 22:28:31

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Re: Distance

2 unit away from yaxis and 3 unit away from x AXIS? ??


MZk

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#10 2017-04-24 22:29:34

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Re: Distance

Do not forget to visualize problems by drawing diagrams and plots.
True there is alot of tricky questions??


MZk

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#11 2017-04-24 22:30:35

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Re: Distance

Question the distance of point (1,1) from origin ??? Plz show with graph


MZk

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#12 2017-04-24 22:38:57

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Distance

You need the distance formula or pythagoras for that.

44jAfpo.png


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#13 2017-04-25 00:31:30

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Re: Distance

So distance is??? How calculate ??I think it is one
Because 1 from x axis and 1 from y axis


MZk

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#14 2017-04-25 01:05:06

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Distance

6R4rRtI.png

What is the distance of blue line segment?


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#15 2017-04-25 02:02:54

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Re: Distance

We calculate by scale or other thing??or other method??

Why use distance formula there why In my above question we not use formula??.


MZk

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#16 2017-04-25 02:05:23

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Re: Distance

How to use phytagoras theorm in this question??


MZk

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#17 2017-04-25 04:09:31

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Distance

The Pythagorean theorem states that the 3 sides of a right triangle are related by this a^2 + b^2 + c^2. Know how to apply that?


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#18 2017-04-25 13:45:10

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Re: Distance

It make right triangle only in this question ?? It is possible to use this formula in my question of Distance of point (2,3) form y axis ???


MZk

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#19 2017-04-25 13:54:45

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Distance

It is not necessary to use Pythagoras on such an easy question.


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#20 2017-04-25 15:17:42

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Re: Distance

ok but in my question can is use phytagoras??

distance of point 2,3 form yaxis


MZk

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#21 2017-04-25 15:52:36

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Distance

I do not think so. The distance of (2,3) from the y axis is a straight line. There is no right triangle.


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#22 2017-04-25 16:00:11

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Re: Distance

But if it' is negative such as Distance of point (-2,3) form y axis ???
So why ans is 2??? Why not negative


MZk

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#23 2017-04-26 07:46:47

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Distance

If you can define what a negative distance is then we can talk about that.


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#24 2017-04-26 13:56:16

Zeeshan 01
Member
Registered: 2016-07-22
Posts: 648

Re: Distance

If you draw I can tell you about what I am saying


MZk

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#25 2017-04-26 14:49:33

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: Distance

There is no such thing as a negative distance.

The distance formula for points (x2,y2) and (x1,y1)

Because the number (x2 -x1) is squared and then added to (y2-y1)^2 it is easy to see that the distance is always positive.


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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