Lesson plan

# 3. Use perpendicular and parallel lines to describe 2D figures (A)

teaches Common Core State Standards CCSS.Math.Content.4.G.A.2 http://corestandards.org/Math/Content/4/G/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4

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Lesson objective: Apply knowledge of parallel and perpendicular lines to design a playground.

This lesson provides an opportunity for students to apply their knowledge and understanding of parallel and perpendicular lines to a real-life situation. Students are asked to design a geometric playground that includes three pairs of parallel lines and three pairs of perpendicular lines.

Key Concept students will use:

• draw and identify parallel and perpendicular lines

Skills students will use:

• identify lines in two-dimensional figures
• classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines
• understand concepts of angle and measure angles (Grade 4, Unit 10)

Students engage in Mathematical Practice 4 (model with mathematics.) as they design and draw a geometric playground that includes both parallel and perpendicular lines.

Key vocabulary:

• parallel lines
• perpendicular lines
• right angle

Special materials needed:

• straightedge
• sheet of paper to check right angles
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• 3. Use perpendicular and parallel lines to describe 2D figures (A)