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Lesson Plan

Identify and draw parallel and perpendicular line segments by examining their characteristics

teaches Common Core State Standards CCSS.Math.Content.4.G.A.1 http://corestandards.org/Math/Content/4/G/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6
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Big Ideas: Objects can be arranged in an infinite number of ways. We can describe an object’s location by the way it is arranged with other objects. This lesson builds on students' knowledge of points, lines, rays, and line segments. The task asks students to draw line segments connecting various stores together, but the line segments can only be connected with a right angle. Through exploration of the drawings, students will see that some line segments never intersect and are always equidistant while other line segments intersect at right angles, leading to an understanding of the terms "parallel" and "perpendicular." Their work drawing parallel and perpendicular line segments builds towards students' future work in identifying such line segments in two-dimensional figures. Vocabulary: parallel, perpendicular, right angle Special Materials: Rulers or straightedges Protractors, drawing triangles, or square corners Grid paper (optional)
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