Thanks to Chhabra law firm

posted Feb 7, 2017, 4:55 AM by Hilaire Fernandes

Thanks to Rohit Chaabra for his support to the Dr. Geo project through its sponsorship program. Dr. Geo encourages smart IT practices for kids, thanks to its reflexive environment for interactive geometry and programming.

Thanks to Hloom

posted Jan 2, 2017, 5:57 AM by Hilaire Fernandes   [ updated Jan 2, 2017, 6:21 AM ]

A warm thank you to Hloom to support Dr. Geo through its sponsorship program. This is a nice encouragement to our effort to develop great free software as Dr. Geo.

New user guides

posted Dec 29, 2016, 11:29 AM by Hilaire Fernandes   [ updated Jan 2, 2017, 6:01 AM ]

The Dr. Geo user guide sources were converted to the GNU Texinfo documentation system. Compiled versions for both html and pdf can be read at the Help page. More information about the sources can be read in the dedicated forum page.

Get started with Dr. Geo for geometry

posted Sep 11, 2016, 8:02 AM by Hilaire Fernandes

Christopher Whittum wrote a nice introduction to Dr. Geo. His article guides new user into Dr. Geo geometric construction. Worth reading for anyone new to Dr. Geo and interactive geometry in general.

Dr. Geo 16.10 release

posted Sep 9, 2016, 1:51 PM by Hilaire Fernandes   [ updated Sep 10, 2016, 7:42 AM ]

Dr. Geo, the interactive geometry and programming software, release 16.10, is ready for download.
It comes with the usual bug fixes and a new French programming API for French speaking kids: programmed sketch can be written in French Smalltalk!

The following script in French Smalltalk:

| figure a b c m1 m2|
figure := DrGeoCanvas nouveau.
figure pleinEcran; afficherGrille; afficherAxes.
a := figure segmentDe: 2@ 3 a: 0@0.
a nommer: 'a'.
b := figure segmentDe: 0@0 a: -1@2.
b nommer: 'b'.
c := figure segmentDe: -1@2 a: 2@3.
c nommer: 'c'.
m1 := (figure mediatrice: a) couleur: Color red.
m2 := (figure mediatrice: b) couleur: Color red.
(figure mediatrice: c) couleur: Color red.
figure cercleCentre: (figure intersectionDe: m1 et: m2) passantPar: 0@0.
(figure point: 0@0) montrer

produce this output:

Médiatrice et cercle circonscrit

Someone to test Slovak translation?

posted Apr 11, 2016, 7:17 AM by Hilaire Fernandes

Slovak flag

Miro is looking for someone to test his Slovak translation of Dr. Geo.
Read his post to contact him.

Dr. Geo 16.03c

posted Mar 21, 2016, 4:27 AM by Hilaire Fernandes   [ updated Mar 21, 2016, 6:34 AM ]

Dr. Geo 16.03c release is ready to download.

Main changes are (details in the change log):
  • Bugs fix, mainly in the Smalltalk programming interface and related
  • New features
  • New translations

Fibonacci spiral

posted Mar 11, 2016, 9:44 PM by Hilaire Fernandes

Constructed Fibonacci spiral
The Fibonacci spiral is based on the Fibonacci sequence to construct a curve forming a spiral. This spiral and some variants appear in the constructions of live entities. In this article we present a computed, interactive version of this spiral with the help of Dr. Geo, an interactive geometry and programming application. Later we discuss on the interest of this approach in mathematics secondary teaching.

Continue reading this article.

Drawing the Parabolic Trajectory of an Object under Gravity

posted Feb 21, 2016, 2:07 AM by Hilaire Fernandes

Parabolic trajectory under gravity
When you throw an object into the air, its trajectory is a parabola. How do its instantaneous velocity and the vertical and horizontal components of the instantaneous velocity change over the course of its trajectory? What happens when the initial speed is larger? Smaller? What happens if the gravity were larger? Smaller? Zero? Negative? Holding gravity and the initial speed constant, in which direction can you throw to make the object reach the farthest point along the horizon?

Continue reading this article

Dr. Geo 15.12

posted Dec 6, 2015, 12:10 PM by Hilaire Fernandes   [ updated Dec 6, 2015, 12:17 PM ]

Dr. Geo 15.12 release is ready to download.

Main changes are (details in the change log):
  • Optimisations
  • Bugs fixes
  • New features
  • New translations

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