3
   

If you look sign the guessed book

 
 
Reply Tue 2 Feb, 2010 06:46 am
If Farmerman plants out 4 touching circles to fit the edges of his square farm, then much bigger is the total unused space compared with the unused space between the 4 circles?
  • Topic Stats
  • Top Replies
  • Link to this Topic
Type: Question • Score: 3 • Views: 1,060 • Replies: 9
No top replies

 
View best answer, chosen by oolongteasup
jespah
 
  2  
Reply Tue 2 Feb, 2010 07:12 am
@oolongteasup,
Bigger, and it involves pi somehow.
George
 
  2  
Reply Tue 2 Feb, 2010 07:29 am
@jespah,
Mmmm . . .
Pi!
0 Replies
 
Tryagain
 
  1  
Reply Tue 2 Feb, 2010 08:15 am
Let XP and XQ be normals to AC and AB. Since the three angle bisectors are concurrent, AX bisects angle A also and therefore XP = XQ.

Let's assume XD > XE.
Then ang(PDX) < ang(QEX)
Now considering triangles BXD and CXE,
the last condition requires that ang(DBX) > ang(ECX)

OR ang(XBC) > ang(XCB)
OR XC > XB Thus our assumption leads to : XC + XD > XE + XB
OR CD > BE which is a contradiction.

Similarly, one can show that XD < XE leads to a contradiction too. Hence XD = XE => CX = BX

From which it is so easy to prove..... the cycle polynomials for the five platonic solids (and I threw in the tesseract for good measure).

tetrahedron: (x1^4+3x2^2+8x1*x3)/12
cube: (x1^6+6x2^3+3x1^2*x2^2+8x3^2+6x1^2*x4)/24
octahedron: (x1^8+9x2^4+8x1^2*x3^2+6x4^2)/24
dodecahedron: (x1^12+15x2^6+20x3^4+24x1^2*x5^2)/60
icosahedron: (x1^20+15x2^10+20x1^2*x3^6+24x5^4)/60
tesseract: (32x6^4+x2^12+48x8^3+x1^24+24x1^2*x2^11+12x2^2*x4^5+32x3^8+12x4^6 +18x1^4*x2^10+12x1^4*x4^5)/192

Good to see ya brown eyes.
0 Replies
 
rosborne979
  Selected Answer
 
  2  
Reply Tue 2 Feb, 2010 08:33 am
@oolongteasup,
oolongteasup wrote:
If Farmerman plants out 4 touching circles to fit the edges of his square farm, then much bigger is the total unused space compared with the unused space between the 4 circles?

The unused space "between" the circles is 1/4 the size of the total unused space in the farm.

Is 3/4 "much bigger" than 1/4, I don't know, but it is bigger.
0 Replies
 
Joe Nation
 
  1  
Reply Tue 2 Feb, 2010 10:19 am
Then why are there crop circles?
http://ec.europa.eu/research/rtdinfo/47/images/47_art04_01_4568.jpg
0 Replies
 
Joe Nation
 
  1  
Reply Tue 2 Feb, 2010 10:21 am
Oh, and for the question asked, is the result the same no matter what size each circle is as long as they touch the edges?

Joe(ponders)Nation
0 Replies
 
Seed
 
  1  
Reply Tue 2 Feb, 2010 12:28 pm
@oolongteasup,
Are you sure it was Farmerman who did this and not Visitors from another star? Maybe we should get the Mystery Van involved in this?
0 Replies
 
Region Philbis
 
  1  
Reply Tue 2 Feb, 2010 12:35 pm
@oolongteasup,

A: Farmerman has an ET infestation
0 Replies
 
oolongteasup
 
  1  
Reply Tue 2 Feb, 2010 09:45 pm
@oolongteasup,
in order of appearance:

jespah - deserving of a small piece of pi

George - she's apples

Tryagain - craft award for cutting and pasting blue sky

rosborne - incidently correct 4 the answer was in the question, lovely logic lad


Joe Nation - expanding the edges of (parenthetical research)

Seed - arrives on the starship that is sheridans 1750 play ' the rivals'

Region Philbus - explores the philbus-flung region




touching
0 Replies
 
 

Related Topics

Amount of Time - Question by Randy Dandy
logical number sequence riddle - Question by feather
Calc help needed - Question by mjborowsky
HELP! The Product and Quotient Rules - Question by charsha
STRAIGHT LINES - Question by iqrasarguru
Possible Proof of the ABC Conjecture - Discussion by oralloy
Help with a simple math problem? - Question by Anonymous1234567890
How do I do this on a ti 84 calculator? - Question by Anonymous1234567890
 
  1. Forums
  2. » If you look sign the guessed book
Copyright © 2025 MadLab, LLC :: Terms of Service :: Privacy Policy :: Page generated in 0.03 seconds on 02/01/2025 at 07:51:37