Lesson plan

Identify geometric attributes in two-dimensional figures 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.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Big Ideas: Two-dimensional shapes can be described and analyzed by their attributes. This lesson builds on students' knowledge of various geometric attributes: points, lines, rays, and line segments, both parallel and perpendicular. The task asks students to identify these attributes in real-life two-dimensional shapes (street signs). Through an exploration of each sign, students will begin to see that shapes can be sorted by common attributes. This builds towards students' future work in classifying two-dimensional figures by identifying these geometric attributes. Vocabulary: acute angle, line segment, obtuse angle, parallel, perpendicular, point, right angle