Lesson plan

# 15. Gwen's Fence: Create side lengths of a rectangle given its perimeter (A)

teaches Common Core State Standards MP8 http://corestandards.org/Math/Practice/MP8
teaches Common Core State Standards 3.MD.D.8 http://corestandards.org/Math/Content/3/MD/D/8

# 15. Gwen's Fence: Create side lengths of a rectangle given its perimeter (A)

Lesson objective: Generate side lengths for possible rectangles that have a given perimeter.

This lesson provides an opportunity for students to apply their knowledge and understanding of perimeter to a real-life situation. Students are asked to create plans for an animal pen by generating dimensions of rectangles that have a perimeter of 100 meters.

Key Concept students will use:

• Perimeter is the sum of the length of the sides of a polygon.

Skills students will use:

• Calculating perimeter

Students engage in Mathematical Practice 8 (Look for and express repeated reasoning) as they generate side lengths of rectangles that will all have the same perimeter.

Key vocabulary:

• dimensions
• length
• perimeter
• rectangle
• side
• width