Using Geometer's Sketch Pad (GSP) these scripts will help you to construct the following:

Centroid

Circumcenter

Circumcircle

Euler Line

Incenter

Incircle

Medial Triangle

Mid-segment Triangle

Orthic Triangle

Orthocenter

Square, given a side

Triangle Centers

Pedal triangle

Center of Nine point circle

Nine Point Circle

Trisecting a line segment

Equilateral triangle, given a side

Isosceles triangle, given base and altitude

135 degree angle

Locus of vertex of a fixed angle that subtends a fixed segment.

Golden Rectangle

Divide a segment AB into two parts that form a golden ratio.

Pentagon, given a radius.

Pentagon, given a side

Hexagon, given a side.

Octagon, given a side.

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