



 This page contains sample files created with The Geometer's Sketchpad, using mainly lines and circles (straightedge and compass) construction and tools from the 'Construct' menu (such as parallel/perpendicular lines, midpoints, bisectors). See next page for the explanation and demonstration of such techniques. Some constructions may also make use of the tools from the 'Transform' menu, usually as alternative means. See another page for more examples of such tools. Viewlets are provided to demonstrate some constructions in the corresponding sample files.






 Construct different types of polygons





 The following viewlets show you how to construct some of those polygons in this file. Each construction starts with those elements specified in the bracket.






 equilateral triangle (2 vertices on one side)






 square (2 vertices on one side)






 square (center and one vertex)






 regular pentagon (center and a vertex)






 regular pentagon (2 vertices on one side)






 parallelogram (3 vertices)






 parallelogram (3 vertices)






 rhombus (2 vertices on one side)






 kite (2 vertices on a diagonal)






 equilateral pentagon (2 vertices on one side)






 equiangular pentagon (2 vertices on one side)






 make a custom tool (macro) for constructing equilateral triangles






 Triangle Centers: centroid, circumcenter, incenter, orthocenter, ninepoint center






 perpendicular bisectors and circumcircle






 angle bisectors and incircle






 Identify different types of triangles by drag and check






 Definition of radian; explore ratio of arc length to radius






 Compare 2 numbers on a number line; explore the effect of multiplying a positive or negative factor






 Angle at center is twice the angle at circumference subtended by the same arc






 Angles in the same/alternate segment






