Tag Archives: GeoGebra

Week in Review 1 – March 2012

Welcome to another edition of Week in Review. Looks like another busy week is ahead. I will be in Baguio for a 3-day training, so I am not sure if I’ll have the time to write there.

For a little bit of promotion, Baguio is the summer capital of the Philippines.  The temperature there is relatively lower (15˚C to 26˚C, but can drop down to 7˚ C) compared to Metro Manila (23˚C-37˚C). It’s a great place to go if you want to escape summer heat.

Anyway, before my Baguio escapade, here are the list of post for this week.

Mathematics and Multimedia

My Other Blogs

Updated GeoGebra Tutorials (now in version 4.0)

Explore Math and Multimedia

That’s all for this week. Have a happy weekend everyone.

2011 GeoGebra Institute Activities

In 2011, we at the GeoGebra Institute of Metro Manila (GIMM) have squeezed our schedule and have given GeoGebra trainings to teachers and students from all over the country. Here are the list of trainings that we have conducted.

GeoGebra Basics
Date: February 16, 2011
Venue: EARIST College, Manila
No. of Participants: 30

Introductory Course on the Use of GeoGebra in Teaching and Learning Mathematics
Date: May 5-6, 2011
Venue: UP NISMED, University of the Philippines, Diliman, Quezon City
No. of Participants: 21

Lesson Study for Teaching through Problem Solving with GeoGebra
Date: May 9-13,2011
Venue:  NISMED, University of the Philippines, Diliman, Quezon City
No. of Participants: 20

Introduction to GeoGebra
Date: October 1, 2011
Venue: St. Therese College, Pasay City
No. of Participants: 41

GeoGebra Fundamentals
Date: November 16, 29, 2011
Venue: Santa Lucia High School, Pasig City
No. of Participants: 18

GeoGebra Fundamentals In-House Seminar
Date: November 25, 2011
Venue: UP NISMED, University of the Philippines, Diliman, Quezon City
No. of Participants: 15

In addition, we are also working on a book on College Geometry with GeoGebra (the title has not been finalized yet).  Hopefully, it will be tried out this school year  and will be published late this year or early next year.

We are also planning to have Level 1 and 2 GeoGebra trainings this summer (April-May, no definite date yet). If you are interested, please email me at gip@gmail.com or mathandmultimedia@gmail.com.

Guest Post: GeoGebra Investigation of the Equiangular Spiral in the Flight of an Insect

If you are near an outside lamp after dark you will notice some insects spiraling around it. Are they simply attracted to the light?

If an insect positions its body in a certain direction and keeps a constant angle with the light rays coming from the Sun or the Moon (which are parallel), it will follow a straight line trajectory. However, people brought to the night sky electric lights emitting radial rays. The insects, continuing to follow the same way of orientation will keep a constant angle with the light rays, but this time they will not fly on a straight line. The trajectory will be an equiangular spiral.

Here are two GeoGebra applets modeling this phenomenon.

http://lima.osu.edu/people/iboyadzhiev/GeoGebra/FlightOfInsect.html

***

Irina Boyadzhiev (author) is a lecturer in mathematics at the Ohio State University at Lima. Her GeoGebra applets are available at: 

http://lima.osu.edu/people/iboyadzhiev/MyGeogebra.htm

 

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