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

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#1201 2014-01-06 05:45:09

gAr
Member
Registered: 2011-01-09
Posts: 3,462

Re: Bafflers?

Hi bobbym,

That's okay, found the link.


"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

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#1202 2014-01-06 05:46:01

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?

I have provided the picture in post #1201. I still get the same answer.

[Picture removed by administrator]


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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#1203 2014-01-06 05:52:43

gAr
Member
Registered: 2011-01-09
Posts: 3,462

Re: Bafflers?


"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

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#1204 2014-01-06 05:55:14

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?


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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#1205 2014-01-06 05:58:29

gAr
Member
Registered: 2011-01-09
Posts: 3,462

Re: Bafflers?

I too did something like that.

I had seen a similar problem in brilliant, but in its current format it would be impossible to find!


"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

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#1206 2014-01-06 06:01:10

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?

I do not like the new format at Brilliant. I liked the old one better.


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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#1207 2014-01-06 06:08:10

gAr
Member
Registered: 2011-01-09
Posts: 3,462

Re: Bafflers?

Me neither. I rarely go there now, it's not possible to keep track of the problems and discussions there, just looks like a flash flood of questions!

Logging off, see you later..


"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

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#1208 2014-01-06 06:10:11

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?

Hi gAr;

It is a shame! Many people complained but no one is listening.

Have a good night. See you tomorrow.


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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#1209 2014-02-24 05:54:14

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?

New question:

A circle is inscribed in a square with sides of 10 and a quadrant circle with radius 10 overlaps as shown in the drawing. What is the area of the red region?

A says) Exactly 1. Saw your answer B, as usual it was wrong.

B says) That is somewhat close there A, you are getting better.

C says) I got the right answer and it agrees with A.

A says) Bravo C!

D says) I got B's answer.

E says) I got around .7

What did you get?

View Image: 0WFeK.png

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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#1210 2014-02-24 21:57:30

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,811

Re: Bafflers?

Hi Bobby,


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

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#1211 2014-02-24 22:54:17

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?

Hi phrontister;


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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#1212 2014-02-25 01:45:08

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,809

Re: Bafflers?

Hi bobbym

I am getting

Last edited by anonimnystefy (2014-02-25 01:47:42)


“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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#1213 2014-02-25 01:58:12

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?

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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#1214 2014-02-25 03:02:23

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,811

Re: Bafflers?

Hi,

This is how I went about it in Geogebra - which is pretty close to stefy's.

That other answer I got in my  previous post - which was also pretty close to stefy's - used the fractions given in Geogebra's 'Exact evaluation' from their CAS, but I take it that if stefy's is the right answer then Geogebra may not be truly 'exact'...although we agree for many decimal places.

View Image: 2014-02-26_0-14-51.png

Last edited by phrontister (2014-02-25 03:12:51)


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

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#1215 2014-02-25 03:12:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?

Hi phrontister;


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

#1216 2014-02-25 18:03:20

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,811

Re: Bafflers?

Hi Bobby,


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

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#1217 2014-02-25 20:31:53

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?

Hi;

Your progress with it has been excellent. True, there are zillions of files and the demonstrations are incredible but to get through them requires a studious mind. Wunderbar!


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

#1218 2014-02-26 04:25:24

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,811

Re: Bafflers?

Hi Bobby,


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

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#1219 2014-02-26 04:31:26

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?

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.

Offline

#1220 2014-02-26 05:03:02

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,811

Re: Bafflers?

Hi Bobby,

This is what I did (had to research the lune idea first as I'd never heard of it before, but I came across the term in searching for 'crescent', and then used Wolfram's lune formula):

View Image: Shape area.png

"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

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#1221 2014-02-26 05:05:30

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?

You solved it using the lune! I was unable to and had to use the left region.


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

#1222 2014-02-26 05:16:18

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,811

Re: Bafflers?

It's a horrible-looking formula and I'll never try to understand it! dizzy But it worked beautifully and shrank down a lot when simplified.

Here is the link.


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

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#1223 2014-02-26 05:17:26

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,414

Re: Bafflers?

Yes, I was there. Can you show me your M workings that I can follow. That page drove me crazy.


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

#1224 2014-02-26 14:06:39

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,811

Re: Bafflers?

Hi Bobby,

Here is a much better version of my M explanation (I deleted the previous one), plus an amended drawing to suit it:

Edit: There's now an amended version of this amended drawing in my next post...

View Image: Shape area.png

Last edited by phrontister (2014-02-26 21:27:36)


"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

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#1225 2014-02-26 19:17:18

phrontister
Real Member
From: The Land of Tomorrow
Registered: 2009-07-12
Posts: 3,811

Re: Bafflers?

I made a mistake with the formula for IC on my last drawing...so here's the update.

View Image: Shape area.png

"The good news about computers is that they do what you tell them to do. The bad news is that they do what you tell them to do." - Ted Nelson

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