Saturday, August 3, 2013

More Math, Less Fighting #7

Not that there's a lot of fighting these days. For that, we must thank math.

Or think math. But it's Saturday. So fun math. Enjoy!

15 comments:

Freeman Hunt said...

"fun math" is a link.

Freeman Hunt said...

That gamepuzzles.com sells things that make great gifts. Everyone likes them.

Sharc said...

And Clementi as a reward. Nice.

Dear corrupt left, go F yourselves said...

I played the mini-lamond ring. I struggled at first, but then I realized the shapes can be rotated.
weee!

deborah said...

I couldn't figure out how to make them rotate. I know it says hold down right arrow key...but then what?

chickelit said...

Here's a combination of math and poetry:

The Kiss Precise by Frederick Soddy

For pairs of lips to kiss maybe
Involves no trigonometry.
'Tis not so when four circles kiss
Each one the other three.
To bring this off the four must be
As three in one or one in three.
If one in three, beyond a doubt
Each gets three kisses from without.
If three in one, then is that one
Thrice kissed internally.

Four circles to the kissing come.
The smaller are the benter.
The bend is just the inverse of
The distance from the center.
Though their intrigue left Euclid dumb
There's now no need for rule of thumb.
Since zero bend's a dead straight line
And concave bends have minus sign,
The sum of the squares of all four bends
Is half the square of their sum.

To spy out spherical affairs
An oscular surveyor
Might find the task laborious,
The sphere is much the gayer,
And now besides the pair of pairs
A fifth sphere in the kissing shares.
Yet, signs and zero as before,
For each to kiss the other four
The square of the sum of all five bends
Is thrice the sum of their squares.


Published in Nature, June 20, 1936

Freeman Hunt said...

Click on a piece to select it. Don't hold down, just press the right arrow key to rotate the selected piece.

Dear corrupt left, go F yourselves said...

Deborah - left click on the object once. You will see a rainbow circle on the object. Use the arrow keys on your keyboard to rotate.

Dear corrupt left, go F yourselves said...

Hexnut jr. is kicking my bottom.

sakredkow said...

~~Puzzlin' you is the nature of my game~~

Chip Ahoy said...

Success! New Amazon link suddenly appears every time I am near, just like me it wants to be close to me. OnthedaythatIwasborn theangelsgottogether anddecidedtocreateadreamcometure

deborah said...

Thx Freeman and April.

JAL said...

what's ture, Chip?

Freeman Hunt said...

Quintapaths is consuming me.

Freeman Hunt said...

And just as I type that, the bits and bytes smile upon me. Hooray!