Area Tutorial 4 – Derivation of the Area of a Circle

We have learned that the area of a parallelogram is the product of its base and its height, and the circumference of a circle with radius is . To find the area of a circle with radius , divide it into congruent sectors (blue and red divisions) then arrange them as shown below. Figure 2 […]
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Enhancing your Geometric Drawings with Google Sketchup

If you would like to enhance your geometric drawings, then Google Sketchup is one software that I would recommend. Google Sketchup is 3-dimensional modeling software designed for architects, engineers, filmmakers and game developers, and other related professionals (Wikipedia).  It is now used to create models in Google Earth. What makes Google Sketchup advantageous over other […]
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GeoGebra Basic Construction 3 – Right Triangle

In this construction, we  use the Perpendicular Line tool to create right triangle ABC where angle B is the right. First, we construct segment AB, then construct a line perpendicular to segment AB and passing through B. Then, we construct point C on the line, hide the line and connect B to C as well […]
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