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13 Jun 2006 - 00:08

news from nowhere part 13


Ed is in the basement teaching Chapter 10 Area and Volume Formulas to Christopher. ("In Chapter 10 students learn to find the area and the volume of many figures by using formulas. Students also learn to recognize the relationship among different figures." [ed.: I just bet they do!])

My job is to guess what item or items Ms. K will put on the test that the kids have never seen before and have no idea how to do.

I'm guessing she'll have a 3-dimensional teardrop shape, or, maybe, a 3-dimensional mailbox-shaped figure.

But if she does, will she ask for surface area or volume?





any guesses from the field?

I'm starting a pool.





or...

She could also put on some killer nets.

That would be death.


So...I wonder if I should make him memorize the 11 nets that make a cube?


11nets_cube.gif







announcing phase 4 math pool
phase 4 math entries



-- CatherineJohnson - 13 Jun 2006

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I can't see how to do a 3D teardrop shape without calculus, so I'm going to put my money on the mailbox shape. And she will ask for both surface area and volume.

-- GoogleMaster - 13 Jun 2006


well, the figure I was thinking of isn't exactly a teardrop. It's an ice cream cone, only it's skewed, kind of.

Saxon Algebra 1 has them.

-- CatherineJohnson - 13 Jun 2006


We're doing mailboxes tomorrow.

I also have to make sure Ed taught him spheres.

-- CatherineJohnson - 13 Jun 2006


plus we better practice how to spell sphere

-- CatherineJohnson - 13 Jun 2006



wtf02_small.gif

-- CatherineJohnson - 13 Jun 2006


My money's on a figure with measurements that couldn's exist in 3-space. Oh, and it won't represent anything with a real-world analog, either.

(I know, just too obvious. Sometimes, though, you have to shoot fish in a barrel. Mean little suckers, those fish.

-- DougSundseth - 13 Jun 2006


Volume of the Klein Bottle!

-- RudbeckiaHirta - 13 Jun 2006


Are you kidding? Is he really supposed to memorize those 11 little shapes and how they form a cube?

-- CarolynJohnston - 13 Jun 2006


who knows?

That's a joke - I have no idea what she'll put on the test

I just know it will be something they've never done before & don't know how to do, related to area & volume formulas. (Nets are in the chapter, too.)

-- CatherineJohnson - 13 Jun 2006


Carolyn, my thought exactly: Wotthehel does this have to do with anything?

And Catherine, remember that those "nets" can be flipped or rotated, so you have to understand that (in the case of the 11th shape)... nets0613.gif

-- OldGrouch - 13 Jun 2006


good god

thanks, Old Grouch

AND THAT WAS ON MATH FORUM!

-- CatherineJohnson - 13 Jun 2006


Okay, I was having too much fun with The Gimp. Here's a second illustration, FWIW:

netsb.gif

"Nets" with no symmetry have 8 possible arrangements (rotations and flips). Those with one axis of symmetry have 4*.

*assuming you don't track particular squares.

-- OldGrouch - 15 Jun 2006

WebLogForm
Title: news from nowhere part 13
TopicType: WebLog
SubjectArea: IrvingtonMath
LogDate: 200606121947

Attachment sort Action Size Date Who Comment
nets0613.gif manage 2.9 K 13 Jun 2006 - 16:36 OldGrouch  
netsb.gif manage 8.0 K 15 Jun 2006 - 00:09 OldGrouch