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Constructing an equilateral triangle on 3 parallel lines

Author:
GeoGebra Institute of MEI
Topic:
Constructions, Equilateral Triangles
Construct an equilateral triangle with one vertex on each of 3 parallel lines using just a straight edge and a pair of compasses.
The points marked as crosses can be used to move the lines and the angle tool can be used to check your answer.

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