Measuring segments is a free educational video by Khan Academy.It helps students in grades HS practice the following standards HSG.CO.D.12.
1. HSG.CO.D.12 : Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.). Copying a segment; copying an angle; bisecting a segment; bisecting an angle; constructing perpendicular lines, including the perpendicular bisector of a line segment; and constructing a line parallel to a given line through a point not on the line..
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