Others‎ > ‎1. Construction Problems‎ > ‎

1. Construct a regular pentagon

Steps to construct a regular pentagon inscribed inside a circle.
Actually, the side of a regular decagon has been constructed first.

http://www.geogebratube.org/material/show/id/15741 (Download GeoGebra file)

Move the control (red cross) from left to right to see how a regular
pentagon inscribed inside a circle can be constructed
.

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