Lesson 7

Mismo perímetro, figuras diferentes

Lesson Purpose

The purpose of this lesson is for students to practice finding the perimeter of shapes and to understand that many different shapes can have the same perimeter.

Lesson Narrative

In previous lessons, students learned they can find the perimeter of a shape by adding the lengths of the sides. In this lesson, students match shapes with the same perimeter and draw different shapes that have the same perimeter.

  • Action and Expression
  • MLR7

Learning Goals

Teacher Facing

  • Find the perimeter of two-dimensional shapes.
  • Understand that many different shapes can have the same perimeter.

Student Facing

  • Aprendamos sobre figuras que tienen el mismo perímetro.

Required Preparation

CCSS Standards


Building Towards

Lesson Timeline

Warm-up 10 min
Activity 1 15 min
Activity 2 20 min
Lesson Synthesis 10 min
Cool-down 5 min

Teacher Reflection Questions

As students worked in their small groups today, whose ideas were heard, valued, and accepted? How can you adjust the group structure tomorrow to ensure that each student’s ideas are a part of the collective learning?

Suggested Centers

  • Can You Draw It? (1–5), Stage 3: Grade 3 Shapes (Addressing)
  • How Are They the Same? (1–5), Stage 3: Grade 3 Shapes (Addressing)

Print Formatted Materials

Teachers with a valid work email address can click here to register or sign in for free access to Cool Down, Teacher Guide, and PowerPoint materials.

Student Task Statements pdf docx
Lesson Cover Page pdf docx
Cool Down Log In
Teacher Guide Log In
Teacher Presentation Materials pdf docx