3D Parametric

[Sean Bird]

There is post with tips and helpful information of how 3D parametric can be enjoyed in high school math classes.

Enjoy,

Sean Bird

[Dennis Donovan]

Sean,

I added movable cross sections with a slider, I got the Square and semi-circle x-sections to work well, I couldn't get the equilateral triangles to show the actual x-section, but I think I am close, I need someone to look at it and fix the parametric for the triangles (if possible).  I tried a bunch of thing I thought would make it work but to no avail.  In three cases, the x-section parametric is the last one defined for each page.

I saved the file in HH format, but it looks MUCH better in computer view.

Dennis Donovan

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From: Sean Bird <covena...@gmail.com>
To: tins...@googlegroups.com
Sent: Monday, September 3, 2012 2:34 PM
Subject: [tinspire] 3D Parametric

There is post with tips and helpful information of how 3D parametric can be enjoyed in high school math classes.

Enjoy,

Sean Bird

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[Sean Bird]

Dennis,

Nice job. It certainly is a bit tricky. See the image for the slice of the equilateral triangle. I greatly appreciated your response. I'll be updating the Volume by Cross section file posted on https://sites.google.com/site/tinspiregroup/assignments

[Dennis Donovan]

Thanks Sean.  I guess I need a 3D refresher, it's been a very long time.  Honestly, I basically knew what I was doing for the square, and I lucked into the semi-circle, I did what seemed right to the z-coordinate.

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From: Sean Bird <covena...@gmail.com>
To: tins...@googlegroups.com

Sent: Monday, September 3, 2012 3:34 PM
Subject: Re: [tinspire] 3D Parametric

[John Hanna]

Spoiler alert!

If you’re trying to create then this file is not for you.

Notes (from 1.1):

Sliders:

      i - controls the position of the cross-sectional slice

     b - the shape of the base

     c - the shape of the cross section

Shapes of base:

    1 - circle

    2 - square

    3 - triangle

    4 - mixed (parabola and line)

    5  - undulating (2 sine curves)

Shapes of cross sections:

    1 - square

    2 - equilateral triangle

    3- semicircle

    4 - rectangle

 

See attached…

     John Hanna

     jeh...@optonline.net

     www.johnhanna.us

     T³ - Teachers Teaching with Technology

     "the future isn't what it used to be."

 

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From: tins...@googlegroups.com [mailto:tins...@googlegroups.com] On Behalf Of Dennis Donovan
Sent: Monday, September 03, 2012 3:17 PM
To: tins...@googlegroups.com
Subject: Re: [tinspire] 3D Parametric

 

Sean,

[Sean Bird]

WOW John! 

Have you been holding out on us, or was this in some small way inspired by our discussion?

Kudos! Well done. 

Has anyone given it a spin on a handheld?

- Sean Bird

On Mon, Sep 3, 2012 at 8:08 PM, John Hanna <johne...@gmail.com> wrote:

Spoiler alert!

...

From: Sean Bird <covena...@gmail.com>
To: tins...@googlegroups.com
Sent: Monday, September 3, 2012 2:34 PM
Subject: [tinspire] 3D Parametric

 

There is post with tips and helpful information of how 3D parametric can be enjoyed in high school math classes.  https://sites.google.com/site/tinspiregroup/classroom-news/3dparametric

 

Enjoy,

Sean Bird