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