# Compass/Protractor Constructions

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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. Sonoma State University, Dr. Steve Wilson A helpful scientific calculator that runs in your web browser window. Holt Online Learning Worksheet - Construct a triangle given two sides and the included angle measure (sas) - 2 problems Math Open Reference A site that goes through general descriptions of angles and the types of angles, but includes additional interactive construction demonstrations. Hamilton's Math to Build On! Worksheet - Bisect an angle with compass and straightedge Math Open Reference Step-by-step demonstration of how to construct obtuse (greater than 90 degrees) angles. Math Open Reference Step-by-step demonstration of how to construct a circle that passes through 3 specific points. Math Open Reference Worksheet - Two orthocenter construction problems Math Open Reference Worksheet - Construct 30-60-90 triangles using a compass and straightedge Math Open Reference Worksheet - Construct a triangle given one side and two adjacent angles - 2 problems Math Open Reference
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