How to construct a 30-60-90 triangle with compass and straightedge
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Math Open Reference
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Questions and answers from experts.
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Ask Dr. Math
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Step-by-step demonstration of how to construct a 60 degree angle.
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Math Open Reference
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Step-by-step demonstration of how to construct a 45 degree angle.
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Math Open Reference
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Step-by-step demonstration of how to construct a 30 degree angle.
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Math Open Reference
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Step-by-step demonstration of how to construct a right angle.
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Math Open Reference
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This web page shows an easy to follow process for constructing a line tangent to a circle from a given point on the outside of the circle.
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Sonoma State University, Dr. Steve Wilson
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This web page shows an easy to follow process for constructing a perpendicular bisector.
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Sonoma State University, Dr. Steve Wilson
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This web page shows an easy to follow process for constructing a line perpendicular to another line through a point not on the line.
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Sonoma State University, Dr. Steve Wilson
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This web page shows an easy to follow process for constructing a perpendicular line through a point on a line.
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Sonoma State University, Dr. Steve Wilson
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