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#1 2013-04-08 14:24:05

cooljackiec
Member
Registered: 2012-12-13
Posts: 160

altituds

Find the length of the shortest altitude of a triangle with sides of lengths 10, 24, and 26.


I see you have graph paper.
You must be plotting something
lol

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#2 2013-04-08 15:11:29

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,980

Re: altituds

Hi;


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#3 2013-04-10 11:57:25

cooljackiec
Member
Registered: 2012-12-13
Posts: 160

Re: altituds

thanks. help on this?

a median of a triangle is a line segment from a vertex of a triangle to the midpoint of the opposite side of the triangle. The medians to the legs of a certain right triangle have lengths 13 and 19. What is the length of the hypotenuse of the triangle?


I see you have graph paper.
You must be plotting something
lol

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#4 2013-04-10 20:23:26

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 15,202
Website

Re: altituds

Is it


'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Humanity is still kept intact. It remains within.' -Alokananda

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#5 2013-04-10 21:24:46

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,883

Re: altituds

I would say that is correct.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#6 2013-04-11 11:38:14

cooljackiec
Member
Registered: 2012-12-13
Posts: 160

Re: altituds

thanks!

in triangle RST, RS = 13. ST = 14, and RT  15. If M is midpoint of ST, what is M?


I see you have graph paper.
You must be plotting something
lol

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#7 2013-04-11 12:23:03

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,980

Re: altituds

Hi cooljackiec;

You have left something out of the question, please copy it the way it was given to you.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#8 2013-04-11 14:52:27

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 15,202
Website

Re: altituds

What is M

?????

Last edited by Agnishom (2013-04-11 15:01:04)


'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Humanity is still kept intact. It remains within.' -Alokananda

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#9 2013-04-11 16:43:35

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,980

Re: altituds

Hi Agnishom;

It is the midpoint of one of the sides.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#10 2013-04-11 16:53:33

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 15,202
Website

Re: altituds

His question isn't clear


'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Humanity is still kept intact. It remains within.' -Alokananda

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#11 2013-04-11 16:58:34

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,980

Re: altituds

You are correct, the OP has left a portion out. I have guessed at that portion.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#12 2013-04-12 00:44:58

Nehushtan
Member
From: London
Registered: 2013-03-09
Posts: 611
Website

Re: altituds

Just like to point out that there’s an elegant formula for the altitude of a triangle in terms of its side lengths: Given a triangle with sides a, b, c, the altitude perpendicular to the side with length c is given by


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#13 2013-04-12 10:30:26

cooljackiec
Member
Registered: 2012-12-13
Posts: 160

Re: altituds

yes, it was RM. thanks


I see you have graph paper.
You must be plotting something
lol

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#14 2013-04-12 12:11:11

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,980

Re: altituds

Hi cooljackiec;

Then please take a look at post #7 for the answer.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

#15 2013-04-12 14:05:32

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 15,202
Website

Re: altituds


'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Humanity is still kept intact. It remains within.' -Alokananda

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#16 2013-04-17 12:11:22

cooljackiec
Member
Registered: 2012-12-13
Posts: 160

Re: altituds

thx. can you answer these, i cant figure them out:

A square and an equilateral triangle have the same perimeter. Let A be the area of the circle circumscribed about the square and B  be the area of the circle circumscribed about the triangle. Find A/B .

Let M be the midpoint of side AB of triangle ABC. Angle bisector  AD of angle CAB and the perpendicular bisector of side AB meet at X . If AB=40  and MX=9 , then how far is X from line AC?(do this have anything to do with pythag?)


I see you have graph paper.
You must be plotting something
lol

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#17 2013-04-17 13:14:09

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,980

Re: altituds

Hi;

For the first one I am getting 27 / 32.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

#18 2013-04-17 13:32:16

cooljackiec
Member
Registered: 2012-12-13
Posts: 160

Re: altituds

thanks!


I see you have graph paper.
You must be plotting something
lol

Offline

#19 2013-04-18 11:55:05

cooljackiec
Member
Registered: 2012-12-13
Posts: 160

Re: altituds

any input on second problem? i havent gotten much


I see you have graph paper.
You must be plotting something
lol

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#20 2013-04-18 11:57:00

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,980

Re: altituds

I am getting 9 as the answer.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

#21 2013-06-02 01:56:53

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,883

Re: altituds

Is it just me or do we not need the length of AB in the last question?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#22 2013-06-02 06:04:38

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,980

Re: altituds

Hi;

AB is 40 but now I think we need more info. The length of AC would be nice.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

#23 2013-06-02 06:05:19

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,883

Re: altituds

We do not need the length of AB.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#24 2013-06-02 06:09:36

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,980

Re: altituds

Of course we need AB but it is given.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Offline

#25 2013-06-02 06:11:36

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,883

Re: altituds

We do not need it. Did you try drawing a picture in GG and then changing AB?


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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