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Is it possible to draw an equilateral triangle with its vertices lying on three sides of a rectangle, or on four sides of a square using just straight lines and ruler only?
Can you construct an equilateral triangle using only a compass and a straight edge? - Quora
Constructing a square - Geometry
How to draw an equilateral triangle in a circle, using a compass and straightedge - Quora
3 Ways to Draw an Equilateral Triangle - wikiHow
Construction of Squares Using Ruler and Compass
Construction of a square - Fast and easy steps #shorts
Worksheet - Square
geometry - Construct a square of given area - Mathematics Stack Exchange