Monday, September 3, 2012

Free, Semi-free, and Dependent Objects

In GeoGebra, an object may be free, semi-free, or dependent. It is important to understand the differences among the three to perform effective geometric constructions.

This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com


A free object does not depend on any object. You can move a free object anywhere on the Graphics view. In the figure above, points O and C are free objects. Point O determines the center of the circle which can be placed anywhere, and point C determines its radius.

A semi-free object, on the other hand, depends on one object. Semi-free objects can be moved but with restrictions. In the applet above, point A is a semi-free object. It can move, but only along the circumference of the circle.

Lastly, a dependent object depends on two or more objects. Unlike the other types of objects mentioned above, it cannot be moved by the mouse. For instance, point B above depends on point A and point C. Since it is the midpoint of points A and C, it will only move if point A or point C are moved. 

Exercise: In the applet Exploring Triangles, identify the free, semi-free, and dependent objects.

Snapshot


4 comments:

  1. Watch video online at pinoy tambayan lambingan official free gma tv shows network in the world. every person like our site for pinoy tv series online. Pinoy series online in hd video available.

    ReplyDelete
  2. thans for giving me such information and it is really informative.
    Here is Something Special For Philipinies They Can pinoytva Tv Shows In HD Quality Ang Click Here to Visit The SIte

    ReplyDelete
  3. Here is Something Special For Philipinies They Can pinoy Tambayan In HD Quality Ang Click Here to Visit The SIte <a href= pinoylambingantv.net

    ReplyDelete
  4. Find All The Tv Shows of Pinoy Tv Channel Online here. The Blood Sisters TFC Tv Shows is a very Famous Tv Network In the World. Watch Also Pinoy Tambayan at Lambingan.

    ReplyDelete