Comments for Mathematics and Multimedia

Comment on Proof Tutorial 2: Proving Square Root of 2 is Irrational by Contradiction by Formal Proof of the Infinitude of Primes

Formal Proof of the Infinitude of Primes — Mon, 21 May 2012 12:05:56 +0000

[...] are going to use the proof strategy called proof by contradiction. Our proof is summarized as [...]

Comment on Introduction to Similarity by Using Similarity to Prove the Pythagorean Theorem

Using Similarity to Prove the Pythagorean Theorem — Mon, 21 May 2012 04:39:41 +0000

[...] Using Similarity to Prove the Pythagorean Theorem Posted on May 21, 2012 by Guillermo Bautista | Leave a comment var addthis_product = 'wpp-264'; var addthis_config = {"data_track_clickback":true,"data_track_addressbar":false};if (typeof(addthis_share) == "undefined"){ addthis_share = [];}The Pythagorean Theorem is one of the most interesting theorems for two reasons: First, it’s very elementary; even high school students know it by heart. Second, it has hundreds of proofs. The proof below uses triangle similarity. [...]

Comment on The Algebraic and Geometric Proofs of Pythagorean Theorem by Using Similarity to Prove the Pythagorean Theorem

Using Similarity to Prove the Pythagorean Theorem — Sun, 20 May 2012 21:01:32 +0000

[...] (typeof(addthis_share) == "undefined"){ addthis_share = [];}The Pythagorean Theorem is one of the most interesting theorems for two reasons: First, it’s very elementary; even [...]

Comment on Are all infinities created equal? by jr_bautista

jr_bautista — Sat, 19 May 2012 22:23:48 +0000

Are all infinities created equal?: A one-minute explanation that not all infinities are equal. The video shows t… http://t.co/gTHDQsVJ

Comment on Counting the Real Numbers by Are all infinities created equal?

Are all infinities created equal? — Sat, 19 May 2012 22:23:14 +0000

[...] 4, and so on. If the video is too fast or too short, you can read a more detailed explanation in Counting the Real Numbers. This entry was posted in Set Theory and tagged counting numbers, counting the real [...]

Comment on GeoGebra Tutorial 21 – Spreadsheet and Similarity by GeoGebra 4.0 Tutorials, MTAP 50, and more

GeoGebra 4.0 Tutorials, MTAP 50, and more — Sat, 19 May 2012 07:08:34 +0000

[...] Tutorials to version 4.0: Spreadsheet, Slider, and Curves of Best Fit (Tutorial 20) ; and Spreadsheet and Similarity (Tutorial 21); Spreadsheet, Vectors and Matrices (Tutorial [...]

Comment on GeoGebra Tutorial 20 – Spreadsheet, Slider and Curves of Best Fit by Math Teachers at Play 50 and More

Math Teachers at Play 50 and More — Sat, 19 May 2012 07:06:27 +0000

[...] have updated the following GeoGebra Tutorials to version 4.0: Spreadsheet, Slider, and Curves of Best Fit (Tutorial 20) ; and Spreadsheet and Similarity (Tutorial 21); Spreadsheet, Vectors and Matrices [...]

Comment on Platonic Solids: Why only five of them? by The Marvels of the Platonic Solids

The Marvels of the Platonic Solids — Sat, 19 May 2012 01:12:00 +0000

[...] regular polygons, there are only five Platonic solids, and it can be shown mathematically that no other Platonic solids exist. The Platonic [...]

Comment on GeoGebra Tutorial 7 – Sliders and Rotation by Mickey D

Mickey D — Fri, 18 May 2012 09:47:24 +0000

Whoops – I posted that faster than I meant – all the praise remains, and the angle colour point is irrelevant as it is covered in your original text (now I have read further)!!

Comment on GeoGebra Tutorial 7 – Sliders and Rotation by Mickey D

Mickey D — Fri, 18 May 2012 09:42:47 +0000

Thanks again.

When I rotate teh triangles, the red/blue/green colours of the angle indicators are not maintained – i get 3 green ones again.
Perhaps because of the upgrade to Geogebra 4.
Not a problem – but I thought I’d mention it in case you intend to redo this lesson.
Really enjoying the tutorials – even though for classes i have produced more complex work already, this is a good way to make sure I am learning everything. Thanks